One of the auxiliary bishops for the U.S. Military Archdiocese was the son of a Cristeros, who witnessed a what the Mexican Government did. My base was within his area of responsibility, and we both went numerous time on the Military Pilgrimage to Lourdes. That was where he told a group of us about his background and how he came to be a priest.
At the time, I thought this was all "history" and could never happen again. But it isn't history, and not only can it happen again; it is happening again.