You're saying something that looks close enough on the surface but is fundamentally different.

Crimes perpetuated by people of migrant background doesn't equate to immigration being the cause of these crimes. If we accept that rhetoric, violent crimes are overwhelmingly done by men, so being a men is the cause of violence, right ?

Men, especially young men, do commit violence more than women. Perhaps "being a men is the cause of violence" is not correct, but "being a man makes you much more likely to commit violence".

What is your point?

I think there is a difference between structured immigration programs to let skilled workers in, and giving people asylum. The outcome of letting in refugees who have the trauma of suffering (and maybe participating in) violence all their lives, living in countries that have had educational systems break down, etc will differ from letting in a few skilled workers.

Sure.

Yeah but what happens when it's only conservative governments that limit immigration to skilled workers, and when the left wing government comes into power they expand it to refugees, and economic migrants? Australia and Canada can have the right system, but it doesn't matter if it is being short circuited for short term political gain and ideological reasons