But we don't. We could lock up all people that stab people or glass people as well but you know the reasons why we don't.
This guy will almost certainly get a life sentence but that won't necessarily be long enough. The woman in Bristol got 12 years. These **** will have a miserable existence if he lives, he'll likely be in constant pain and for his sadistic attack on woman and her kids, will be target for other inmates.
You also know that we need to have diplomatic relations with countries in order to deport people.
And before the Taliban took control of Afghanistan again there's also a big event started at the end of 2019 in China that would have made deportations difficult and changed government priorities. Can't think what it was.
Do you want rule of law or do you want a government official rubber stamping minor and medium level offences for deportation?