Please list some of the different ways Protestants differ on how to be saved.
Being as I am a former catholic myself, I will add my two cents. True Christians DO NOT differ on the only doctrine that matters, the plan of salvation. There is no way on God's green earth they can differ on that. NO WAY. Differences may come, when they discuss things like pre trib, post trib, soul sleep, and other less important issues, but when it come to Heaven/Hell, there is not even the tiniest margin for error, not even a little bit.
Every night, I pray for the reversion of apostate Catholics.
I think the difference for Catholics and why they perceive the Protestants to be so different from each other is that they tie all those things to salvation. Once they left salvation by faith alone in Christ alone and added other requirements each difference became monumental.