If ABL might have suspended his SV tendencies had Bergoglion simply formally opened the door of return, then shame on him.
I mean if it was purely pragmatic, sure. But I could also see the reasoning going something like.
"Bad Pope wants to excommunicate us? Well we know we're right, but also he DOES have the keys to the kingdom of heaven, so that's a real problem. Maybe he isn't Pope."
"Terrible Pope *isn't* using the keys against us, and is actually basically willing to have us in communion without demanding we accept Vatican II? I mean he's still bad but maybe this isn't actually a logical contradiction."