Obnoxious? You mean like "Uppity ******"?
More like "uppity guy who wants to wear blackface" or "uppity drag queen."
A black man has no option of keeping his race to himself. If someone is inclined to be prejudiced on account of it, he's either going to have to limit his interactions to those which don't take place in person or risk being subjected to that prejudice.
A gay man has the option, but keeping his sexual orientation completely to himself also means living a sexless life -- he can neither find a partner, nor appear in public with one, without tipping his hand at some point.
An atheist always has the option of being incognito. Being an atheist doesn't require you to DO anything, ever. If you want to express your opinion on the subject of gods, you're free to do it. Hearing a different opinion in no way requires you to express your own.
You've implied that you think "religion" is an evil that needs to be opposed. That goes way beyond being an "uppity" anything. It's like saying white people are an evil that needs to be opposed if you're a black man, or heterosexuality is an evil that needs to be opposed if you're gay.
It's one thing to oppose religious discrimination, and another thing to oppose religion. You claim to be engaged in the second battle. To me, that puts you more on the side of people who discriminate than people who are engaged in a noble civil rights struggle.
I think the religious discrimination battle has largely been won. As an atheist, I am not paid less, barred from military service, denied housing, or prevented from marrying and having children. No one compels me to attend religious services, profess belief in gods, or ride in the back of the bus.
If you need more excitement in your life, being obnoxious is probably going to dial up the drama. If it makes you feel better to pretend your struggle is in any way comparable to the struggles of black people in the 60s or even today, it's not illegal to have a rich fantasy life. Some people like to pretend they're Luke Skywalker or Harry Potter. Use the force, warrior man.