The Common Perception Towards Those Who Wield (Dark) Magic

[LostLogia4]

Black and white magic was lost along with Mhach and Amdapor due to the War of the Magi which had caused the 6th Umbral Calamity, so the 6th Umbral Era have seen the times where mages was prejudiced for draining the aether off the land until it becomes desolate all over. That's why the surviving mages invented the aetherial accelerators so they could safely use their bodily aether to cast the spells from red magics. Incidentally, these accelerators can't be used with the ambient aether because it'll overwhelm the caster. Things has settled by 6th Astral Era to the point that Thaumaturges Guild could establish them openly in Ul'dah, but the perception on Black and White magic remains grim. Black mage job quests from Heavensward onwards has a Hearer who are hunting a rogue conjurer who practiced black magic in a thirst of power and are vary of you until near the end of the arc, and he repeats his skeptical attitude towards Shantotto since she was the founder of the Black Magic. White magic are looked on more positively since they are rarely misused, but non-Padjals will need to do some convincing that they could apply their magic into proper use.

Regular civilians would regard the Egis as dangerous avatars, partly because the Egis are based from the primals, so they will always draw the enmity of the people who had lost their significant others to the primals. There's also one case (in the Summoner job quest) where a rogue summoner sicced an Ifrit-Egi on a caravan, and was shocked to saw ours when we summoned it for comparison's sake and wondered why we could summon the selfsame creature.

I can't give any comment about the Dark Knights though.