I really am tired of other people trying to force laws down my throat to comply with a God they invented for behavior control.
The Crusades cost us almost 800 years of human development, I would rather not have Religion try to destroy the world again.
Things we'd have right now if we didn't have religion:
Cure for Cancer [stem cell research].
Ability to Regrow Limbs [stem cell research].
Cures for deadly congenital defects (Khrons, Diabetes, Multiple Sclerosis.) [stem cell research]
Unified Society and Government [current norms prevent societies of different religion from peaceful coexistence.]
Space Travel [Loss of hundreds of years of astronomical data during the crusades as the Catholics didn't want anyone believing that the Earth wasn't the center of the universe.]
Less bigotry, racism, and societal strife. [refer to peaceful
Global suffrage (voting rights). [Religion has always treated the minority population of the group it's established in, and all women, as second-class citizens, often denying these groups the right to vote. See 'Unified government"]
Acknowledgment of human rights globally [Religion refusing to acknowledge the rights of homosexuals to marry, the right for a woman to have an abortion, etc].
Possibly a few more.
Things we would lose if we lost religion:
Large death tolls as a result of holy war and bloodshed. [War in Iraq, war between the Jews and Palestinians which has been raging for over 1,000 years.]
It's a pretty decent trade, don't you think?
This isn't to say that organized Religion is the source of the worlds problems, or that there isn't any non-religious opposition to issues like gay marriage, stem cell research, abortion, and et cetera, but if you look, and I mean really look, most arguments against these things stem from some sort of 'biblical law'.
Jesus isn't here anymore, guys, and we don't live in barns anymore. We don't stone people to death either, nor do we sacrifice lambs to the sky. We have telecommunication, satellites in orbit, 500-foot-tall buildings and hospitals.