Hmm...
At some level it probably is me a bit. Apart from the fact that I'm not Christian and never really have been. Some arguments against it, though, strike me as on poor footing and it's worth criticising both sides of the argument at times. Not seen an example in this thread but you see a few. I remember once getting slightly excited about the "Bible says pi = 3" point and then realised that this was a stupid argument.
There are evidently many people in this world who still believe in God, and I know a few of them. Friends, relatives, teachers, colleagues-to-be. Attack, attack, attack, that sometimes does go on (example: this thread, recycling an old argument) seem -- well, not pointless, perhaps, but certainly the arguments against religion deserve to be tested just as much as the arguments for.
So, yes, I will argue against any point on either side of this if I don't think it stands up to (my) scrutiny. Because, well, because I learn more about the debate sometimes by arguing against myself. It's not an uncommon tactic (There's a story that the Wright brothers of first-ever aeroplane fame switched sides in all their debates). And maybe even some of my own points have something to offer too, though that's for others to judge.
I've thought about this carefully for years, and it's not something I ever want to stop thinking about.