It's more that during the reformation everyone was publishing leaflets about how everyone they disagreed with was actually worshipping the devil so they came up with actually really inane divisions like kinds of iconography and worked backwards from there to develop brand new theology on the fly to justify the insane things they published. For most people 'guy on the cross' just equals 'be thankful that's not me' but when some Luther fanboy writes a pamphlet about how catholics love to see jesus suffer eternally because they're satanists you end up inventing new theology to say 'no, actually jesus's sacrifice is eternal and you just don't get it like I do'