There was quite a bit more than, "Can I go to the new Mass? Sure."
To refresh your memory, begin listening at 1:01:44.
He begins precisely as M. Taylor said was correct (and in line with Msgr. Lefebvre) in 1996: Distinguishing between principle and practice; the objective principle and subjective circuмstances.
Can anyone explain why Msgr. Williamson's position was correct in 1996, but erroneous in 2015-2022?
M. Johnson had it right all along: Abbes Pfeiffer/Hewko saw an opportunity to exploit their simple faithful, in an attempt to get the resistance to head their way.
Keep in mind that Pfeiffer/Hewko were already publicly at war with Msgr. Williamson for two years regarding:
-They were angry he would not place Pfeiffer in charge of a seminary
-They were angry that he would not endorse their "red light" position
-They were angry that he would not organize on the basis of a traditional congregation, calling the independent enclave plan "stupid"
-They had been publicly accusing him of "sheep stealing" since 2014, when he supported Msgr. Zendejas servicing the Ridgefield area resistance chapels
-They were criticizing him publicly for confirming Feeneyite faithful
-They were resistant to his requesting them to separate from the Mexicano
By the time Mahopac rolled around, it was one more complaint to fill the pews.
Fortunately, M. Taylor has refuted all this business by showing the incredible consistency in Msgr. Williamson between 1996 - 2022, which he is clear to state was the position of Msgr. Lefebvre.