Just from subreddit discussion where I engaged with some of them to see what's what.
* It is ok for them to see ED as lesser game - but ridiculing CIG, Chris or SC is huge no no (might be cultural difference);
* 'ED will die when SC will be released' is also very strong with these people;
* Apparently mocking around and 'we play with friends' is seen as huge plus for SC (which might be, just observations);
* It is obvious that many of them really don't want space game, but 'everything game' where they can do everything with friends. Space is just medium;
* They are misinformed what ED is and where ED goes to. They lack information beyond Horizons first release;
So their attitude towards ED is mostly siege mentality plus lack of information - and their pure defensive mechanism kicking in for ridiculing game they have pinned their hopes on. They see it as hate and evil thing to do.
I would say those are mostly twenty somethings, and early thirties.
Re the "play with friends" thing: I think that's one of the key differences between the two, SC being geared towards team play and ED being geared towards single play (although you can do either in both).
I think think sometimes people - on both sides - forget that these are two different games.