I'm no racist, I'm not anti-immigrant at all, but I think that the channel crossings are clearly a major security risk both in terms of indivual crimes and terror threats (eg the IRGC being found to be sending operatives through that route).
It's also clear that many of those coming to the UK and Europe have criminal backgrounds or bad mental health - yes most of them are from countries with very different cultures in terms of their attitudes towards women etc, but even that doesn't explain it, if you actually go to those countries, most people aren't criminals obviously. So whether they're fleeing justice, or the authorities actually just point them at Europe and make them someone else's problem, I'm not sure.
I really doubt that many of them at all are genuinely fleeing persecution - at best they'll be non-criminal opportunists.
I also think the Boris-wave millions of legal low-skilled immigrants have been a disaster. I have no animosity towards them personally, they arrived perfectly legally, but it was a truly dreadful decision by Johnson and co, and a massive betrayal to his Red Wall voters, who very very clearly wanted far less immigration, not more of it.
No idea what the answer is, but many parts of the UK and Europe have changed an extraordinary amount in the last two decades, and it's largely not been a positive change.