“Session 8: And since truth cannot contradict truth, we define that every statement contrary to the enlightened truth of the faith is totally false and we strictly forbid teaching otherwise to be permitted. We decree that all those who cling to erroneous statements of this kind, thus sowing heresies which are wholly condemned, should be avoided in every way and punished as detestable and odious heretics and infidels who are undermining the Catholic faith. …All false Christians and those with evil sentiments towards the faith, of whatever race or nation they may be, as well as heretics and those stained with some taint of heresy, or Judaizers, are to be totally excluded from the company of Christ’s faithful and expelled from any position, especially from the Roman curia, and punished with an appropriate penalty…”
Pope Leo X, Fifth Lateran Council, 1512-1517