Boru, the question I have for you is - you make a distinction between V2 (theoretically good) with the abuses (practical application). But the abuses are all one sees.
I see no theoretically good new masses, etc. In fact, Cardinal Ottaviani/Bacci etc (all of whom were good friends with +ABL) in their "Ottaviani Critique" of the new mass (in its purest/theoretical form) said that the new mass was "deficient", "protestant" and "contrary to Trent". This was BEFORE THE NEW MASS WAS INTRODUCED. And the "final product" wasn't different from what +Ottaviani studied.
Are you saying that those who follow V2/new mass are going to save their souls? And aren't Modernists? And that the "liturgical abuses" (i.e. sacrileges/blasphemies) have no effect on salvation? And no effect on grace?
Canon Law forbids attendance at sacrilegious masses, or from heretic priests, or from any liturgical "abuse". Canon Law forbids participation at "abusive" liturgies. Those who participate commit grave sins.
And such have been going on for 50+ years. There's no "secret abuses". It's all out in the open. The V2 "system" is one of abuses; it's the NORM to see sacrileges, communion-in-the-hand, immodest dress, etc. The practical errors are common.
So your argument is that the THEORETICAL Church cannot be prevailed upon by hell, but the practical/street-level/day-to-day can be (and has). That's quite a statement.
No theologian has ever made this distinction. In fact, as I've pointed out in the past, Christ told us to JUDGE by the FRUITS (i.e. practical effects). It's impossible for a (theoretically good) church to give/promote/condone/allow bad fruits/abusive liturgies/sacrilegious masses ON A DAILY LEVEL.
The V2 church is a system of error. It's a systemic, daily, monthly, DECADES-long, error. You can't apologize for it and say it's a "one off". That's ludicrous.