It's more the "small boats" crap that has reduced and therefore reduced their ability to shout about it.

I think people want back to more historically normal levels of migration in general. Possibly less due to what one might consider an integration backlog due to rapid migration.

The illegal migration was an easy target for this since it's indeed the only thing some people are opposed to and it doesn't quite activate a big created class of people that have a migrant background.