Closed mindedness

[surftheiop]

In general ive heard many people say that they dont like religon/religous (especially christians) people because they are "closeminded" . I always sort of went along with their thoughts but then i wondered about atheists. Aren't they just as closeminded or even more closeminded than a Christian? An atheist only one way to be atheist- to believe there is no god, while there are many Christian denominations and most Christians agree that people from (m)any of these denominations will be saved.
Im not saying atheists or religous are more or less closeminded but why is it that the religous are often portrayed as being closedminded ?