More or less: The pot calling the kettle black ? If you research this you will discover St Pius is a quite conservative sect based in Switzerland, all their masses are in Latin and LBGT is not acceptable unless one remains celibate. On the other hand, the Vatican welcomes the LBGT community, and they had also some rather serious issues over decades with pedophilia. https://www.bbc.com/news/world-44209971

This isn't an issue over problems within the SSPX, it's over consecrating bishops without papal approval. If a liberal group did the same thing they would also incur latae sententiae (automatic) excommunication.

I'm no Catholic, but I'm not sure that "tu quoque" overrides papal supremacy