In regards to Adi Mundi, I think that was a bit of an error in PM because there were Darkside wielders before then as a few Jedi have turned such Qui-gon-jinns apprentice Xanatos who became a Dark Jedi which is basically a Sith.

In case if anyone was wondering, Anakin blew up a Trade Federation ship and although they do have a few humanoids they are mainly run by droids. Luke however did blow up a Deathstar and that did have like millions of people. People blew up planets and killed all the life on them.

Also I'm pretty sure Amandla was trying to be slick and used "Gay" in a derogatory way when saying "Starwars is Gay" I've heard people (mainly mainstream trap hiphop fans) say this in regards to nerd culture plenty of times in the form of "this shit is gay".

Other than that, The force is not a thread. It's more like an aura and Yellow lightsabers were wielded by the Templar aka Temple Jedi which were neutral in regards to the force which is why Rey at the end wielded one.