In brief, it is true there was a split over a few topics, including the Thesis and the jab.
It is unfortunate, but sometimes things cannot always work out on the ground.
As someone who adheres firmly to the Thesis and attends Mass at an RCI mission, none of us hold any ill will against SGG. I do wish that they did not attack the seminary, however, which Bishop Dolan did in his last years. He did do a lot of good, however. May he RIP.