No one but God knows what was in his heart at the moment of his death, but after he died, his lawyer released a statement he had written on his deathbed which continued to deny his guilt and also denied the Holocaust (he claimed the ovens at Auschwitz were actually kitchens to feed the prisoners). So, IMHO (and speaking as a non-Catholic), the Pope was right to deny him a church funeral.
If what you say is true, then that’s good enough for me.
This sure doesn’t look too optimistic, though as you said who knows what happened between then and the time he actually did leave this mortal coil (also, was this lawyer putting the muscle on him at the time?)
ADL would show more character if they said they firmly disagreed with honoring a man with a sanctuary funeral under such circumstances, and then left it. After you’ve said what God would presumably have to say, what else is there to say? ADL has unfortunately gotten whiny in many cases and that’s a shame. It undermines their credibility.