“then it’s hard to justify targetting this small group of traditionalists, even though they have some very wrong-headed ideas about the extent of Holocaust.
How did Williamson become “they”? “
If it was Williamson alone among this group then I stand corrected.
Williamson was the only one to publicly express views that can be briefly characterized as denial of the Holocaust of the Jews in WWII; he now regretted the publicity and promised to reconsider his views in light of all the evidence.
However, SSPX as a whole is sometimes described by its critics as vaguely anti-Semitic. Mind you, however, that what SSPX really was objecting to was ecumenism crossing over to indifferentism, when the only orthodox form of ecumenism the Catholic Church should embrace is call to conversion, of non-Catholic Christians to Catholicism and of Jews and other non-Christians, to Christ. There were articles appearing in SSPX publications that highlighted the differences between Catholic Christianity and Judaism that might offend non-Catholics. It looks like SSPX distanced itself from some of these writings lately.