It was interesting and perhaps unfortunate that the fire and the protest in the restaurant happened within a short time of each other but were apparently unrelated.
I don’t think chanting , “Death to…” anyone is appropriate behaviour in a civilised society any more than I think Israel’s treatment of Gaza or West Bank citizens is civilised behaviour.
You’d think they would have learned from the reaction to Bob Vylan in the UK, chanting “Free Palestine” is one thing, “Death to…” is quite another. (As is arson)