Andreas Brekken went onto the Bitcoin SV channel to promote his new shapeshift-competing exchange, sideshift.ai. The SV guys were desperate to pin Andreas down about his criticism of checkpoints in BCH, but they didn't know the first thing about that subject. Andreas educated them about the many checkpoints that have been added to BTC, BCH, and other chains over the last 10 years.
Then the SV guys show themselves to be economically illiterate, and they're unable to defend their pro-state/pro-regulation stance.
Basically the SV guys were completely outclassed and their narrative was taken apart piece by piece.