I have seen a couple of posts about the phrase "Taliban Catholics". I think it originated with John R Allen, the American Catholic journalist. Here is his article explaining why he used it. Whoever is using it now, that seems to be where it came from. It's a good idea to read Allen's explanation.
The danger with some people is that they could wear this name as a kind of badge, taking pride in it. That would be a big mistake. At the same time, because of the righteous defence of those who think they are being included in this term, there could then be some kind of defence offered for the bad manners, insulting language and unjust accusations that are sometimes found on certain blogs. That would also be a mistake. Just as there can be no real defence for using the term, so there should be no defence for the bad behaviour of some of those who think it includes them.