Atheist mention what science says and they ask for evidence before believing.
We have a local atheist group that actually does try to proselytize and recruit members. Overall, they're not nice folks, and are just out for press attention. For them, its not about science, its about attention, bullying and getting a laugh at the expense of others.
Before Covid hit, they were doing a song and dance where they'd request to do an... invocation? Blessing? Can't remember what they termed it, but basically say some encouraging words from an atheist framework in place of where prayer was offered at City Council meetings. Our city enthusiastically encouraged them to do so. When the big night came, the Council People(and crowd) found they'd also brought a news crew, and despite receiving good feedback from the Councilfolks for doing this, they were going around trying to pick fights, and trying to bait out 'resistance'!
Then they started attempting to do the same in neighboring cities. After seeing what happened here, all the other cities opted to just stop the opening prayers rather than give these showmen the attention they were seeking.
So, I don't think all atheists are above proselytizing. My atheist uncle laughs at how many atheists have made a religion out of it.