It’s hard to know who he’s talking about. It really is open to interpretation, unfortunately, and so some very devout Catholics might think he’s talking about the SSPX types, while some more liberally minded Catholics will think he’s talking about those who believe/follow all the rules and teachings of the Church. I fall in the latter group, but I do wish he’d clarify.
My favorite definition of Fundamentalism is: “A religion, any religion, that when confronted with a conflict between love, compassion and caring, and conformity to doctrine, will almost invariably choose the latter regardless of the effect it has on it’s followers or on the society in which it is a part.”
To me this is just like the Pharisee’s who would’t help someone on the Sabbath because it constituted “work”.
Or those Catholics who won’t go to their child’s wedding because it’s lacking the proper canonical form.
Or the whole you can’t use contraception even after you’re overwhelmed with the amount of children you and your spouse already have because God forbid marital sexual intimacy be enjoyed by two people who don’t want to have any more children at this time. Rules are rules. No contraception. Marital happiness be damned.
You get the picture. It’s putting rules before people.