Complex sentence: He did avoid the anti-Semitism, anti-Masonry, and anti-Catholicism of other Conspiracy theorists, saying that such prejudices would "neutralize" anti-Communist, anti-Conspiracy efforts; in fact, according to one source, Welch converted to Catholicism in the months before his death.
Split into simpler sentences: He did avoid the Antisemitism, anti-Freemasonry, and anti-Catholicism of other Conspiracy theorists, saying that such prejudices would "neutralize" anti-Communist, anti-Conspiracy efforts. According to one source, Welch converted to Catholicism in the months before his death.