Question about dealing with heretics who defend John Paul II

Thank you for your question.  First of all, John Paul II wasn’t a Pope.  He was a non-Catholic Antipope; he shouldn’t be referred to as “Pope.” Second, to your question, we’re assuming that you’ve informed them that John Paul II endorsed false religions and held that we shouldn’t convert non-Catholics, etc., etc., which denies the Gospel and Catholic dogma.  Assuming that’s the case, the answer is: Since they won’t even look at the information you’ve tried to present, and won’t hear the things you’ve tried to share, no, there is nothing else you can do for them other than to pray for their conversion. They’re totally closed-minded and so bad willed that they won’t even let the truth in.  There’s no sense dealing with them or approaching them about it.  They should be avoided.  That’s why St. Paul says, with divine inspiration:

“A man that is a heretic, after the first and second admonition, avoid: Knowing that he, that is such a one, is subverted, and sinneth, being condemned by his own judgment.” (Titus 3:10-11)

The Word of God instructs thus because a good willed person will be convinced after the first or second admonition.  If those admonitions have proven fruitless, then you have encountered a level of bad will that is such an impediment that no argument of yours can overcome it.  Hence, with people you’ve tried to reach a few times – who won’t even begin to examine the truth or have repeatedly rejected it – you just need to move on.  Many people, including those on the internet, waste their time with heretics they’ve repeatedly rebuked and who are never convinced.  They e-mail them again and again to no avail, while, at the same time, they are subjecting themselves to the dishonest and faithless arguments which are constantly e-mailed back.  Fighting with such obstinate heretics (i.e., those who have already been admonished multiple times) is fruitless and usually detrimental.  It can be very detrimental because conversing long enough with an obstinate and unbelieving heretic may cause (and has caused) some to doubt the truth themselves.  Listening long enough to unbelieving and heretical arguments may cause one to believe them.