Sure it can. As easily as people of different “Belief Systems” tolerate one another. In my community there are so many churches that some (of differing belief systems) are right next each other and get along very well and in some cases let other belief systems use their facilities on off days.

I think it boils down to the people. If people are tolerant, they can exist together.

Note: Any off the wall belief systems that call for the killing of another belief system obviously could not exist together and probably wouldn’t want to.