me talking about Jonah: well, what does evil really mean?
so you see, a lot of people view evil as an intrinsic trait that informs your decisions/choices. and while it may be true for some characters, it's not the case for Jonah. he comes to the rational conclusion that the only way to not be victimised is to victimize everyone else, that the only way to not be powerless is to be the one with all the power thus the ritual. while he does enjoy causing people to suffer (and obviously observe it) he only really does it when necessary (push Daisy into hunting Jon, stop Melanie's murder attempts, revenge for the burnt statements) and it's not the driving force behind his actions. he is a cruel man but it's not cruelty or evil that drives him but calculated choices aimed at self-preservation
and even with the ritual, Jonah mentions trying prevention first and how it didn't work. there was always a chance of someone else doing a ritual and getting it right and he couldn't risk it. victimize or be victimized etc etc
also back to my original point of how people view evil as an intrinsic trait. this is why so many tma fans can't stand it when you point out the similarities between Jon and Jonah. because well, Jon isn't evil! but does it matter when his choices too cause harm? does it help his victims that he feels guilty about it?