When I saw the thread title, I thought that I'd see if my slow dial-up connection could bring me the thread before it got closed. Picking out a particular religious group indeed - regardless what I think of them personally, this is clearly not the forum to pick on folks for their convictions.
Then, reading the thread itself, I realized that you have been the victim of an attack. While I would normally agree with those here who say "just shrug it off," I believe that groups who foster and support hate or intolerance of others should always be taken to task and called on to answer for their bigotry.
Rather than having the ISP blacklist them or switching your email, I would collect the hate propaganda they send and forward it to your congression representative or to a civil-rights organization.
There are some very vocal idealogical groups in my area, but none have had the audacity to question my religious beliefs or my liesure activities in language which would compel the kind of retribution due to the folks harrassing you.
Threats of eternal damnation, consumption by demons, or any other undesirable occurance amount to assault, intimidation, coersion, and hate propaganda. This is my opinion and may not reflect the opinion of your local legislature or law enforcement agency, but I believe that it should be.