The devil DOES care whether a Christian is Catholic or not.
As I’ve asked some of the others on this thread, do you think that Satan is not behind ISIS’s killing of Christians who aren’t Catholics?
“is Satan behind ISIS killing of Christians who aren’t Catholics?”
ISIS is killing the Coptic Christians who are orthodox Christians and have valid sacraments and holy orders. They also have a valid eucharist. The devil in particular goes after those who have a valid eucharist.
The devil DOES care whether a Christian has valid sacraments and goes after those more severely, yes.