That's not atheistic, it's agnostic.
Well, I could get into the definitions.
A theist is someone who
believes in the existence of one or more deities (gods). Everyone else is an atheist (including you and me). In other words, an atheist is ANYONE who
lacks belief in god(s).
A gnostic person is someone who claims
knowledge about god(s) or the definite non-existence of any god(s). An agnostic person does not make claims of knowledge. In other words, a theist who claims something like "god is good" is claiming they have knowledge and are therefore gnostic. Similarly, an atheist who says they know somehow that there are definitely no gods is also gnostic, due to their claim of knowledge. An agnostic theist believes in god(s), but their belief ends there and they do not posit or claim any knowledge beyond the basic existence of the deity. An agnostic atheist lacks belief in god(s) and does not claim to have knowledge about any god(s) or knowledge that there's definitely no god(s).
Atheism and agnosticism are compatible, and you are likely an agnostic atheist.
And I said when they act like they're better and smarter than someone who believes in religion that they are being assholes.
It has nothing to do with discussing their beliefs.
With your clarification, I agree.
I don't see why we can't let people believe what they want to believe.
So long as you're not shoving your beliefs down someone's throats, then you're good.
Unfortunately religions and their adherents are constantly shoving their beliefs down everyone else's throats. This is evident in laws, attempts to shift curriculums, religious representatives in governments, the use of public funds for religious purposes, attempts to end the lives of young girls for the crime of going to school, defunding scientific research, or, say, putting up a display of the 10 commandments in a public school.
Religious people and irreligious people, theists and atheists, gnostics and agnostics, are all capable of acting superior and being assholes to people who have differing thoughts. And I agree, this attitude is generally not positive, nor is it likely to even be helpful for their own causes. I think being an asshole is pretty assholeish.
Sidenote: simply criticizing religions is not taboo or assholeish in its own right. <3