I beg to differ.
If there is another way to do so I really really really want to know, playing a 1.73 ironman ryuku and I had one of the luckiest starts, 1/1/1 emperor died to give me 5/3/2 or something like that, I beat the shit out of south east Asia so have 4 vassals in 1460, though i'm hoping ming will leave the coalition against me soon... Point being unless something goes wrong I am well on track to launch my own nuke pretty early on. Is there any point in me continuing with the exploit in your videos having been fixed? I've been reading up on the religious unity mechanic all day and I can't see any other way to get it to work