Danger, you are right.
The doctrine of purgatory effectively means Jesus isn't good enough.
That is not Biblical, and this man is not a Protestant. He is a heretic.
Who says that Purgatory has anything to do with Jesus not being good enough? You obviously have no idea what Purgatory is all about. I would urge you to read several of the Catholic posts on this thread *specifically* dealing with the doctrine before you launch on it.
Meantime, defend your statement. Using *Catholic* sources on the doctrine of Purgatory (as opposed to other sources which misunderstand it as much as you do yourself), explain to us how it makes Jesus' sacrifice on the cross insufficient...