The term cult in and of itself is NOT pejorative if one follows Becker's definition, despite Wikipedia's own article on the subject defining it as pejorative.  The Wiki article takes into account several decades' worth of accretions to the technical definition of the word "cult" that should not be considered authoritative, and behaves as though these accretions should have more power than the formal rigor of science.  Are we going to redefine terms as "not NPOV" because 100 million people out of a nation of 330 million abuse them so that they are pejorative?  That's giving far too much power to the hard-of-thinking.   

 Simply defining "Heaven's Gate" as a "religious group" is a compromise not only of the right to call things what they are, but of NPOV itself.  The people who object to the disambiguation of the religious group known as "Heaven's Gate" as a cult are seeking to control not just what we mean by "Heaven's Gate," but what we mean by "NPOV."  It's giving a cheap victory to the small minority of Wikipedia members who want to use Wikipedia as a megaphone for their own sociopolitical agenda without any sort of consensus on the part of the whole community. 

 And that is why we should revert the title to "Heaven's Gate (cult)."