...Vigano, but his writings, which grew increasingly strident in tone, may have contributed to the present situation.
Interesting you say that, because I just came across this article in First Things, which says the same:
"That survey of bishops on the EF was underway last year just as Archbishop Carlo Maria Viganò launched his full-scale attack on Vatican II. Viganò found an echo in the traditional liturgy corner of the Internet, and their embrace of him no doubt contributed to the measures taken by Pope Francis. Viganò has been a thorn in the side of the Holy Father, but he is in self-imposed hiding. His supporters, many of whom frequent the EF, are not—and can be penalized.
Viganò and his Internet promoters are voluble and, to a certain extent, influential. Yet there are vast numbers who attend the EF quite independent of the arguments he makes. They were going to the EF long before he made them. Many likely pay no attention to Internet chatter, just as your typical parishioner in the OF is blissfully unaware of many apparent roiling Church controversies."
https://www.firstthings.com/web-exclusives/2021/07/for-pope-francis-the-mass-is-the-message Of course, for my own part, this was a positive decelopment overall, as more and more are going to see what Francis really is, and react against him. He said he wasn't afraid of schism. Well, he might just have set the ball in motion for an eventual worldwide rejection of conciliarism and conciliarists.
His side of the schism is impotent, while Vigano's/our side of the "schism" is electric.