Just because two people are going to hold different faith views doesn't mean they can't be respectful and courteous to each other. What's the problem with worshiping the God of the Covenant in a Jewish temple?
The point is, being an impolite @ss doesn't burnish one's credentials of leadership.
The Catholic Church has suffered a nasty little minor schism in 1988 and subsequently in which an offensive little group of people known as SSPX or the Society of St. Pius X have been lashing out in hatred against Catholicism (and not just Catholicism) since they were declared schismatic and their leaders excommunicated by John Paul II. Anything John Paul II did just HAD to be evil accroding to these malcontents who resent the discipline imposed upon them by him. Benedict XVI was JP II's closest protege and is therefore on their enemies' list as well. They do NOT speak for Catholicism no matter what they call themselves on the Internet or elsewhere. Pay no attention to them and do not take them as serious people or regard them as Catholics. Catholics don't.