Agnostics profess mankind's inability to definitively know whether or not a divine deity exists (or multiple deities, whatever). Now, unless there was a major press release today that I've missed, this seems the most scientifically informed stance to take.

This image is appropriate.

There are people out there who will claim, entirely solidly, that they not only think that a deity exists, but that the rules that their deity says are moral should be applied universally. To "lay back" and say "well, we can't prove it wrong" is dishonest and misleading.

Allowing false ideas to spread because they make people feel good will never result in a good thing. Allow a set of morals based on false ideals to spread under the guise of tolorance. Allow the majority of people in society to follow any ideaology based on nothing but what they believe, and you are asking for nothing but trouble.

Science is about being open to new evidence, but accepting the evidence that currently exists as well, with skepticism and testing. Current evidence points to every large book that religions are based on are either hugely metaphorical, or outright lies.

Now, while I will agree that you cannot prove there is no such thing as a deity, I do not see it as any reason to accept or tolorate claims that one exists if there is no evidence backing them. Science is accepting things with evidence, not accepting things with nothing disproving them.

or we can stop pointing fingers, and get back to doing whatever gives us the warm and fuzzies.

It is only through debate that we can refine, hone, and ensure that the ideas that people hold in society have solid footing and will lead society in a proper direction. The entire ideological of "sit back and let people believe what they want" starts being poison the moment you cross into the correct side of "don't consider or put down other people from holding opinions that are different than you". Opinions are made to be challenged, stances are made to be argued. Acceptance is going to get us nowhere, debate is going to weed out the bullshit in the end.