Almost all of the “yoots” are French, born in France.
There is no place to deport them to.
Hauling them into Court, charging them with attempted murder, convicting them and hauling them off to prison makes a lot of sense to me.
They have relatives in Arab/ Muslim countries, you can bet your bottom dollar on that. Australia was a good idea, for the Brits many centuries ago. There are always solutions to problems when they come up.