I think it is that we can't do anything about a vast number of serious criminals without cessation from any appearance of such laws. I know that in isolated cases the law is bluntly ignored and treated with contempt.
That's a Daily Mail argument. The UK was a founder member of the Council of Europe in 1949, and the Euro Commission of HR looked heavily to the civil liberties traditions of the UK and others.
It is only the current crop of hard-Brexit Tories that have suddenly taken so against it. The previous 70 years, long before we even joined the EU or abolished hanging, managed to deal with criminals just fine without proposing leaving CoE
I doubt anyone who was aware of both expected leaving the EU would have any connection with the CoE and ECHR membership
If you can't stop criminals without breaking the law yourself get another job. And if you have to trample human rights to do it maybe you should be right next to those criminals, getting the same treatment.
I'm sure you would quickly have a change of heart if you were subjected to the same violations.
I'm sure this is one of the many true reasons for Brexit, all of them hidden from the mass of people voting for it.