So, I presume that you're referring to Fred Phelps and his Westboro Baptist Church? If they're real Baptists, I'm the alien spacelord Xenu.
Anyone can call himself a Baptist. Any church can call itself Baptist. Unfortunately, John the Baptist did not copyright the name.
The Westboro church really is sick. As proof, I'd give a link to their website, if it weren't so disgusting.
Assuming it's the same group, though, that antics of these protesters are a pretty good example of what to expect from them.