So you can make a judgment that the "pope" is not worthy of your obedience but you can't make a judgment about why he is not worthy of your obedience? It's not that hard to research the issue.
Of course we make a judgement, because in knowing our holy faith, we know what offends God even when it doesn't offend the pope, or the pope glories in it and wants us to follow along.
I always find it incredible that this needs explaining to trads at all.
After the example of St. Thomas More: "We remain the popes' good subjects, but God's first." You act as if this is error, or heresy or evil or something. It's not evil, IT'S CATHOLIC.
Meanwhile, some sedes have said they'd forsake the true faith for the new faith if they were convinced the pope is the pope. Talk about reckless abandon. This idea bespeaks of having a faith that is very weak and fruitless, certainly not worth much at all when for any reason, one is ready and willing to just throw whatever faith they have away.