Evolution

How to troll your average Atheist
Polish that Dawkins pole.
Yes, it really is that easy.

Refer atheism as a religion and a belief. This will automatically enrage atheists. GOD PREVAILS!
If religion is the source of all evil, then why was it a religious person who invented the scientific method? (Bonus points if you reveal the theist was a crazy Muslim scientist)
If they belong to a fandom and idolize let's say an actor, tell them that Fandom is like Religion as they treat it in the same way as theist treat religion. Bonus points if they are anime otaku or belong to an anime fandom since most of them see a certain animu girl as god.
"Atheists help spread AIDS because they approve same-sex marriage"
"Prove God doesn't exist"
"It was an atheist that caused World War I that lead to many historical clusterfuck events like Red October revolution that gave birth to dirty communists, World War II, the Arab-Israeli War, the Cold War, the Global War on Terror, the rise of People's Republic of China... just ask Gavrilo Princip's religion."
"Theist people kill more than a million people in a span of centuries, Atheist people kill more than a million faster, in a span of years if not months"
Respond by telling that three of history's worst dictators and mass murderers (Hitler, Stalin, Mao) were all atheists
"Invite them for a session with an Ouija Board"
"It's okay, if I were you I'd be pretty mad at God, too."
"If evolution is true, why are there still monkeys?" (Regardless of whether or not they can correctly answer it, they will fly into a butthurt rage that you would even ask.)
Bring up the fact that evolution and the Big Bang theory are still just theories with plenty of flaws!
Complain about the bias against intelligent design.
"God did it...your science is NOTHING without God."
"Science is ALWAYS based on faith because you never know what the result of an experiment will be (Which is why you perform the experiment in the first place and not just jot down what will happen)."
Tell them "Jesus Loves them" and for extra lulz give them a hug and a bible and see how they react
Or just hug them. They HATE that.
"Hitler was an atheist." Bonus points if you use the above quote proving that Hitler was, in fact, an atheist.
"Stalin was an atheist." Bonus points if you mention to them about the Holodomor (Stalin's Holocaust).
Point out that their posts sound like evangelical preachers' rants, including their tone, intensity, rhythm and measure.
Ask them to explain the manner in which subjective experience arises from brain tissue. Inevitably, they will break down and say that consciousness doesn't exist. At this point you can just start laughing hysterically.
"I'll pray for you."
"Jesus said: Cast not pearls before swine."
"What up faith-cripples!" (Best to say when entering one of their forums)
"What makes moral relativism correct?"
"Atheists are never moral because they do not believe in God," followed up by "Morals are God-given not man-made."
Suggest that if you were down and out in Calcutta, you'd much rather see Mother Teresa than Christopher Hitchens.
If all else fails, Goatse, pain and fifty Jesus posts never go amiss alongside with ALLAH AKBAR!!!
Have feelings.
The way Christians get all of their arguments from the Bible, atheists get all of their arguments from The God Delusion. So saying something along the lines of "Maybe if you formed your own opinions once in a while, instead of parroting everything Dawkins spits out of his sinful mouth, you could truly see the glory of God!" is always worth a good try.
Atheists do not really hate religion, just Christians. Tell them you are a Buddhist. If they start to attack your religion agree with them via this copy pasta "Yes, I see how that could be, the teachings of Buddha taught me to be very open minded. I accept your argument, but Buddha was still right." When they find a person they can't argue with they reach a state similar to an advanced stage of rabies. Kick back and watch the lulz.
Give them an analogy (like this one): "Trying to disprove God with our narrow knowledge of physics is like being given only a hammer to build a house. Every problem looks like a nail".
Tell them to take the Atheist Challenge. As the atheist does not believe in anything science cannot prove, ask him to prove that the universe did not pop into being 5 seconds ago with the appearance of age, then to call his girlfriend and tell her that love is an illusion caused by chemical reactions. Bring an umbrella to shield yourself from the sputtering bullshit.
Apparently, atheism has its own definition of free speech: When I attack you, it's just criticism. When you attack me, you are practicing RELIGIOUS OPPRESSION AAAARGGH THE EVIL THEOCRACY!!!
Copy/paste info from conservapedia's article on atheism. (Such as atheists donate less to charities than christians).
Tell them they're going to hell because God hates fags
Point out that Friedrich Nietzche was in love with his sister, but gave up and started taking it in the ass because he couldn't get laid (srsly [1])
Imply that atheism is a form of liberalism. (refer to abiogenecism/evolution as liberal,this always makes them rage)
Tell them that trying to disprove God within the confines of physics is impossible.
Ask them where all the atomic matter came from in order for the big bang to start.
This is the most important thing, so pay attention! Sometimes you will get an atheist capable of forming full sentences (Rarely is the content any different, however, from what his fellow atheists blather mindlessly about). Instead of attempting to rebuttal with sense, as you will only confuse his addled mind, you can do one of two things. 1)Tell him he's wrong and pretend like you're winning the "debate" 2)Tell him he's wrong and give another case for God's existence. Get him to the point where he feels he must combat your rebuttal by saying if he can't form a rebuttal for it, you're winning. Rinse and Repeat.
Mention that atheism and satanism are the same thing
Tell them: Science knows that the big-bang was a spontaneous, causeless, source-less, purposeless, meaningless event. By extension, all created by it is too.
Use all these arguments. (flail arms for effect) Watch as the atheist sputters and turns red in frustration. That umbrella that was mentioned earlier? Useful here for when the blood vessel in his forehead blows open.
Tell them that Darwin was a Christian, this will cause massive butthurt.