If one accepts that once the four conditions are met, and then infallibility occurs, then one MUST accept all Conciliar canonizations - because it is God operating. One MUST accept "St. JP II the Great, St-to-be Paul VI, St-in-waiting Bergolio, etc. It doesn't matter about the "intention" of the Conciliarists, the lack of Devil's Advocate, or the lack of miracles. If God is the one "engaging infallibility", as Bp W mentions, it is blasphemy and heresy to deny the canonizations.
... unless ...
the man doing the canonizations does not hold the office of pope.
Anti-Lefebvrism? It should have been entitled anti clear and Catholic thinking.
Besides, back in +ABL's day, we had just started to see canonizations about which we harboured some questions (virtually all were real Catholics, born and died before VII, and none were heretics). Now, we see open enemies of the Faith being "canonized".
Sometimes the crisis of the papacy reminds me about St. Augustine's advice about the Trinity. He said that we need to accept the doctrine, and if we seek too hard to understand it, we run the risk of falling into heresy. Today, I think we need to recognize that the Conciliar Church is not the Catholic Church, and if we seek too hard to understand the exact nature of it, we run the risk of falling into error - but, at minimum, we must recognize it as a false church and refuse to be part of it. God will, in His own good time, restore it and give us as deep an understanding of the crisis as He sees that we need.