I have always said that people who claim to know these types of things to a certainty are either misinformed or lairs lol.

There are bad actors on all sides of this issue. Some non-believers can be quite forceful. I have lived in some deeply Christian areas and have seen them be rather aggressive and confrontational as though someone not believing is a personal insult to them. There was once a big "to do" in a class I took. The professor pointed out that many stories in the bible are very clearly adapted from other mythologies which is not incorrect (the nativity story borrows heavily from the birth of Hercules, for example)but a student took this statement as an "attack" and went as far as to demand an apology because someone made an accurate statement. In some parts of the world one can be killed for not believing or believing the wrong thing.

The way I view this is that it doesn't really matter. In practice, whatever god someone does or doesn't think is real changes very little in his or her day to day life. The important thing (to me anyway) is that people don't force things on others and that is a lesson both believers and non-believers need to learn.