They are united in protesting at the actions of Israel in Gaza which is leading to the deaths of many innocent Palestinians and the fact that Western leaders are seemingly condoning this. They are not marching to demand an end to British culture or values.
Take you to task on that one, it’s not Israel’s acts it’s those of Hamas, it’s Hamas who use hospitals and schools as protection for their fighters and the populous as human shields. They and they alone are ultimately responsible, this will become clearer in the coming days and weeks.