I remain puzzled by the fact that the Bp. Williamson "Holocaust denial" controversy continues to be framed as a mere matter of history and law by Bp. Fellay (and even Bp. Williamson himself before he was silenced) when everyone from politicians to academics to the rabbis to the bishops and even the Pope piously speaks of it in theological language.
Every Catholic is within their right and responsibility to resist the errors of "Holocaust" theology as much as any other theological error.