Many atheists will try to convert people just as readily as Catholics or Muslims or any religious person.
Atheism, when seen from a certain light, is a religion. With regards to the origin of the universe and what happens after you die, they make declarations based on blind leaps of faith as well. Just because the leaps are more pessimistic (or based on "science"), it doesn't change the fact that they make declarations that cannot be "proven", are not recorded, and have various gaping lacks of supporting information.
(Note: TRUE scientists do not say that ANYTHING is 100% PROVEN, nor do they state that THEORIES are FACTS which are infallible. Especially when it comes to things that happened billions of years before recorded history, and things that happen beyond reasonable means of measurement or experience. There will likely never
[in our lifetimes, anyway] be a theory which
clearly ascertains a lack of existence of some supernatural "fate"-like force, nor one which
entirely & doubtlessly "proves" how the universe began, nor one that will be able to
truly & accurately define how bodily fluids, catalysts, and electrical impulses travelling through layers of cholesterol can translate what we know as consciousness.)
Many don't seem to understand that the acceptance of what atheists "know" for someone who has a very spiritual side is a frightening, awful thing, which makes no sense to them.
It makes about as much sense to the faithful as religions make to people who consider themselves "faithless".
And, of course, I'm speaking of the CORE fundamentals. Creation of the universe, the afterlife, presence of supernatural forces, a defined set of moral laws. Not the myriad of other traditions or platitudes or fables or cultural concepts.
All pushy or haughty people are annoying.
I wish everyone could just embrace open-mindedness and what it is to just chill the fuck out