Maybe more to it than bigotry?
Looking at this in as favourable light as possible: I wonder if that category was included as whoever put it there was thinking that as LGBTQ+ involves gender/sexual preferences (and usually some discussion of such things) that people might want to block because of possible content to do with sexual(ised) or naked-body content (not necessarily porn)?
BTW I do a lot of filtering work as part of my job and I've never had a request to block LGBTQ+ and we deal with many establishments, including religious ones.
Biting the hand that feeds IT
