One of my best friends was a born-again Christian. We had no problem being friends despite our different views; we agreed that if we talked about it we'd do so in non-insulting terms, from both sides. And there were times we had some good conversations, and times where one or the other of us wasn't feeling it.
Another friend of mine converted when I was seventeen, and gave me the "believe or we can't be freinds" trip. So I told him to hammer sand up his ass, we didn't talk for years, but after some fence-mending maintained an off-and-on relationship -- until he physically attacked me once for deriding the idea of god(s). That was that, and I haven't spoken to him since.
Another friend of mine converted when I was seventeen, and gave me the "believe or we can't be freinds" trip. So I told him to hammer sand up his ass, we didn't talk for years, but after some fence-mending maintained an off-and-on relationship -- until he physically attacked me once for deriding the idea of god(s). That was that, and I haven't spoken to him since.