"Oh to be sure, such religions exists. For example, most classical forms of Judaism believe that non-Jews aren't obligated in the 613 commandment. But, that still means that not convincing people is letting people remain fundamentally ignorant about extremely basic aspects to the nature of reality. That's not cool."

That depends if you think the other people care. In my experience, most people don't. In which case it would be 'not cool' to bother them about it.

I do agree, however, with your example. If you believe in a literal Hell for nonbelievers then it is your absolute, overriding priority to prevent people from going there. However, not all religious people hold those beliefs, and it's unfair to the ones who are capable of amicable disagreement to tar them with that brush.