You ask how many. There is a number, the Liberals have an acceptable number of deaths, in order to be welcoming and not seem mean to foreigners, especially Muslim ones. If we bend over, we’ll actually like it that way, they do.
It’s a marriage agreement made in hell. They won’t cause too much trouble as long as the proper tributes are paid.
The acceptable number of deaths is when the voters begin to notice. The illegal immigration problem has been going on for decades and the Democrats and Republicans knew it but they kept it hidden because they wanted their cheap labor and cheap votes.