Its just a lot of factors together but I think you’re going to have to accept that the channel puts us in a legal bind.
The tricky bit of international law isn’t the convention of rights of refugees or even the EHCR, it’s the laws of the sea. If you find a dingy at sea and it’s not seaworthy or the people are in distress you have to pick them up and take them to the nearest safety. That’s always going to be the UK for anything in our waters. And any dingy is going to get that. This isn’t australia where you can just turn them back in international waters because the migrants coming to Australia look like this:
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So you can make a legal case that they’re seaworthy and you’re just telling them to piss off. If you find someone floating in the channel on a rubber dingy there’s no way around picking them up and bringing them back. At which point the can claim asylum.
Let’s say “fuck the refugees” and that we are going to send them back. Well you’re either now invading somewhere you don’t have an agreement with to parachute a bunch of migrants back home, meaning you’ll get shot at and probably start an international incident at worst or at best look like an even bigger c**t than Israel on the international stage. India tried this in international waters unofficially and it didn’t go down well
So then you’ve got a bunch of people that you’re either paying £45k per prisoner per year to put them in prison, or you may as well process them as asylum seekers and have them working and paying tax.
People who say they want to shoot them or whatever forget we exist in a cramped bit of the world and rely heavily (like all countries) on those around us not thinking we’re complete shit heads. You’re trying to align with countries like China, India, Russia over western nations. Poorer, with less cultural similarity and frankly a bit of a chip on their shoulder about us after that whole empire thing.
If you’d rather your country was like Russia and India than America and Germany then fair enough. But I think you’re in a massive minority.
I can only assume the suggestions about giving them an island are in jest because why on earth would we hand over sovereign land to a bunch of randoms. Because make no mistake if you leave them out there then you either end up providing them services or they end up declaring independence probably backed by someone who would quite like it. Then what? We invade ourselves?