I can say it to offend, fuck, if that's what it boils down to, I don't give a shit. But if that fucks up your and my relationship otherwise, then I think you're the one missing out, not me and I say good riddance.
There is no God. Simple as that. If you want to worship 'God', be it one of the thousands throughtout human history, then do so without fucking up my life. This means: keep religion out of politics, out of morality issues simply 'because', out of evolutionary issues, out of salvation and all that bullshit that was created just to further the riches of the Vatican a few silly centuries ago, and that'll be just fine and dandy.
What Gervais here says, and not to 'sound better' than anyone, is that following a set of "Christian values" doesn't mean being bound to be a Christian, if you are not smart enough to learn good, human values without the help of a religion then you are fucked up three ways on Sunday anyway, let Darwin take his toll.