Like I'm not even an atheist, I've considered myself an agnostic for as long as I've been able to articulate my own beliefs, but it's not lost on me how often atheists in leftist spaces are hit with rhetoric like this:
Why is it bad that atheists are 100% sure that no god or any higher power exists? I mean. That's what they believe.
Everyone else is allowed to be 100% sure in whatever belief they hold and express it, but atheists are held to the higher standard of constantly conceding that "yeah I *could* be wrong haha of course I'm not saying it's impossible for gods to exist I'm just personally unconvinced" because openly expressing any confidence on the certainty of their own beliefs will immediately be perceived as close-minded and invalidating everyone else's belief systems when like.
When you get down to it "all this shit is made up" isn't really a meaningfully more close-minded or invalidating position than "all this shit is made up except for this one, which is the real and correct one". Atheism is just held to a higher standard when failing to immediately back down and cede ground in any situation where it doesn't align with anyone else's belief system is inherently seen as a mark of close-mindedness and intolerance, a standard to which no other religious minority is ever held in these spaces.