Hi, L-Chaim, welcome to WWGHA. I hope you'll find the site and its members entertaining and informative.
I'm new here but for the most part all i have seen is angry tirades directed towards God. My question is this...If God does not exist then why get angry about it ?
You will probably not be surprised to learn that we get this question a lot. And you're right, most atheists are
pretty angry, but we're not angry at God -- as others have pointed out, you can't be angry at something that you don't believe is real. At most, you could say that we're angry at God in kind of the same way that we're angry at Grand Moff Tarkin for blowing up an entire planet just to try to get Leia to reveal the location of the rebel base. Most atheists, however, would probably not even concede that much.
We're not really even angry about religion itself. If religious people worshipped in their own way and kept it more or less to themselves, most atheists wouldn't really care about religion all that much. However, in some societies (including the United States) a significant number of religious believers are not content to simply practice their religion; they wish to force their views and beliefs on everyone else as well. To take one very minor example out of the many I could cite: these religious believers are not content merely to refrain from drinking alcohol on Sunday, they push to have laws passed so that no one at all can buy alcohol on Sunday.
Blaz has already pointed this out, but I'll add my voice in case you missed it: Greta Christina has written an article about why atheists are so angry. I definitely recommend it.http://gretachristina.typepad.com/greta_christinas_weblog/2007/10/atheists-and-an.html
Or do you know He exists and you just dont like Him ?
We get this one a lot, too. It's a strawman. I hope you can now see why.