I don't see why you would feel that your faith is threatened.
The Vatican has always kept as much docuмentation pertaining to the Church as she possibly can. Some of it is good, but the majority of Vatican docuмents are anti-catholic, and viciously so.
Why wouldn't people who have been hell bent on destroying the church since St. Peter, make claims that all sorts of popes and saints have been evil? They have tried literally every conceivable way to dispute, destroy and marginalize the Church.
Besides that, this is sourced from an internet site which should never be trusted. Take it from someone who spent the majority of their life trying to disprove the catholic faith-nothing the world can bring against the faith can break it.
I'm sorry you feel that this is a gut check, but if you do the research, you'll find the truth and you'll end up exactly where you were before you ever saw any of that trash, and have wasted a good bit of time and effort doing so. But, if you're determined to go ahead and try your faith, be sure to at least keep talking to your priest and keep all things in balance.