MobBoss
Off-Topic Overlord
That's the best point I've read on this page (haven't read the last couple pages)
and I see that MobBoss has no response for it.
What response should I give to someone that refuses to acknowledge valid opposition as valid?

His discription of the opposition is just dismissive because he doesnt agree with it and thats it. /shrug.
For example, an even better reason to not build the mosque is that it would show muslims actually care about the nations sensitivity about 9/11, and actually make muslim/non-muslim relations a bit better...
Thats a valid point, irregardless of people around here acknowledging it as such or not.