I think people have been driven to these extremes. For years there have been rumblings of anxiety about the numbers of illegal immigrants entering the country but these have been fobbed off by the people who should be listening.
The intelligentsia sneer at the opinions of what they snobbishly like to label as prejudiced and ill educated (and whose fault is that) but fail to take into account that an awful lot of people are concerned, rabble or not.
In truth, how else can people register their disquiet when the people who could do something about it just won't.
The Rwanda scheme was there waiting but was chucked out for political reasons. And before everyone weighs in, look how it put people off coming for the day or so it was in force. It would be a safe place to process and accept entrants legally, and return those who aren't. (And before everyone weighs in, as someone who has spent time there, it is every bit as safe as here, and with very good infrastructure.)