Would an atheist president bother you?

[rejectamenta]

Nope

You don't understand my point, people who are at personal level atheist mostly declare themselves as "agnostic".
If they declare themselves as "atheist", I believe there is a willingness to be anti religious.

Is there not potential for similar, perhaps even more powerful hostility towards religions other than your own once you've accepted a particular one for yourself? Either way I don't think it's wise to make these assumptions about people.