You make some good points, but the similarity in the pattern of immigration for multiple western countries makes this look like a setup.
It’s not so effective if there is assimilation of immigrants. Not much point unless there is civil war. Unfortunately if there isn’t spontaneous violence, authorities will grow impatient and will predictably generate false flag violence (just like Israel always does) and ham it up in the media.
It isn’t so long since the Bondi Beach shooting in Sydney. While this appeared to be actual animosity of which intelligence agencies were aware in advance, it was immediately used to bring in strict anti-gun and antisemitism laws. This looked completely pre-planned and was used in such a predictable way by the government. Though the shooters were on a terrorist watch list, the government authorised their gun licences, then blamed the shooting community for the outcome.