Look, if “atheism” is just the lack of belief in God, then “religion” is the lack of non-belief in God. Being “religious” doesn’t mean you are poisonous or against reason or anything else. It simply means that you don’t non-believe in God.
Ridiculous? Of course. But if the New Atheists can lump all “religion” into one blobulous category and treat it all as if it were one thing, why can’t we do that with atheism?
Still ridiculous? Of course. At least partially so. The tu quoque form of argument is fallacious in most circumstances, except when it’s used to show the absurdity of the other’s position. I could use it that way to show how absurd it is to treat “religion” as the same thing in all its manifestations everywhere, but there’s no need for that. It’s idiotic enough on the face of it, without needing arguments in Latin and with italic font.