If something happens to me, I'd expect the country i fuelled my tax money into to look after me.

You don't just get to decide I'm worthless once i stop contributing if i spent decades being here.

There needs to be automatic "nationalisation" of sorts... and not behind a paywall. Citizenship in uk is £1400-1600 per person. That's a lot for a family to pay, child could be born here and never leave UK for 15 years, they still got to pay it.

Why would we expect Sweden to keep looking after him if we wouldn't do the same?

For the same reason that, if person A punched person B's child, we would expect person B not to punch person A's child (though punching person A themself is fair game). Keeping or deporting this man and others like him doesn't affect Britain in any significant way; its only "justification" here is spite* and that's just not enough to uproot people from their home of 25 years. The idea that deporting people like this is somehow "returning the favor" to Britain ignores the human reality of what's going on here. And it's not like Sweden is just doing the obvious here; their rejection (and hence deportation) rate is 7 to 9 times the EU average.

*That's the English-speaking internet's justification; I'm sure the Swedish government with its far-right sympathies doesn't need any justification other than xenophobia.