> Now what would you say to these people in such case?

The honest thing would have been to tell them - you're right, yes there's an overrepresenation in crime - but we're working on it , it will get better in the 2nd and 3rd generation (it does but very slowly), etc. But lots of the establishment doesn't seem able to even do that - they have to completely deny the problem, by for example pulling tricks like counting immigrants from India, Thailand and MENA together, or by not allowing the collection of data at all. This is really bad policy imo.

2-3 generations? why should we import criminal foreigners that will make our cities and villages unsafe for decades?

it is not said honestly out loud, because it is absolutely insane, and would be rightfully rejected.