I don't use Reddit or go on other forums such as mumsnet (spits). It sounds as if Reddit is just an echo chamber for extremists.
It's very strange that these people seem to think that they hold the majority view just because they are a loud group on Twatter or Reddit.
I don't think their views are in line with the majority of the British population and frankly the idea that you can tell other people who to date is laughable (if it weren't so sinister).
If we all listened to them and their bizarre views that we shouldn't believe that biological sex is real and that being heterosexual is some sort of outdated crime, the human race will grind to a halt.