Kally's Cauldron

I've been a solitary practitioner pretty much from the get-go. At first it was more out of necessity as I had yet to make contact with the Pagan community. After I discovered the community, I attended one of their bi-monthly brunches. It was ok...I had already met one of the better known members of the community over coffee. Plus I had made contact with another Pagan stay-at-home-mom so she attended as well. Everyone else just kind of nodded at my presence. That didn't bother me, it's just sort of the way of things when there's a newbie in the crowd.
While eating breakfast that morning, the woman beside me attempted to engage me in conversation. I was thankful and readily answered question while asking a few of my own. Post conversation, a few other members of the community came up and started chatting. Nothing wrong with that of course. Until they started laying into Christians like there was no tomorrow!! I know, I know, the Church has hurt a lot of people, but can't we get past that and at the very least, just ignore them? There didn't seem to be any specific catalyst...just seems that Pagan conversation has to involve trashing Christians. Irritation hardly described what I felt at that moment. I didn't say anything of course...it seemed kind of unwise to trash talk one of the more senior members of the community, especially considering how new I was, but I've never gone back.
Why does it seem to be that disliking Christians is a prerequisite for being Pagan? I admit, they can get on my nerves but you always get kooks in every religion so I certainly don't feel the necessity to single out Christianity. Did I miss a memo somewhere??