From your first link:

The massacre of the Rhineland Jews by the People's Crusade, and other associated persecutions, were condemned by the leaders and officials of the Catholic Church. The bishops of Mainz, Speyer, and Worms had attempted to protect the Jews of those towns within the walls of their own palaces, but the People's Crusade broke in to slaughter them. Fifty years later when St. Bernard of Clairvaux was urging recruitment for the Second Crusade, he specifically criticized the attacks on Jews which occurred in the First Crusade. [...] Albert of Aachen's own view was that the People's Crusade were uncontrollable semi-Christianized country-folk (citing the "goose incident", which Hebrew chronicles corroborate), who massacred hundreds of Jewish women and children, and that the People's Crusade ultimately got what they deserved when they were themselves promptly slaughtered by Muslim forces as soon as they set foot in Asia Minor.

So your ancestors were killed by stupid peasants, not the Church.

Few remember the Albigensian Crusade which resulted in the complete destruction of the Cathars.

What? Everyone remembers the Albigensian Crusade. "Kill them all, God will know His own." And if heretics won't repent you should expel them or kill them. I agree with the Church on that one. There are demons who would mislead the people, you can't just let them get away with it. You know what happens when you don't kill the heretics? Communism. And communism killed way more people than the Church ever did.