I liked what you said. But you remarked, "rationality does not require belief." Neither does being irrational. I know a few people who are as unreasonable as they come but have utterly no type of belief in God, any form of righteousness, or ethics whatsoever. On top of everything, rationality not necessarily needs a belief in God but what my point is, non op, is that it can.
And just because someone doesn't feel it is needed doesn't give them the right the blatantly treat another persons view like it's garbage. Seriously, being different doesn't mean wrong. So many believers and non believers don't understand this ideology even when it's as simple as simple gets.