"In reality, questioning immigration is VERY right-wing, and reactionary, xenophobic right-wing at that."

Whose reality is that?

No disrespect intended, but I think you're grossly over-simplifying the issue.

As a generalisation it's not true. Everything should be questioned. Free speech should be the priority, even if we don't agree with what's being said. The original statement said 'questioning', not 'curtailing'."

Where did I suggest preventing free speech? He has a right to say it, but it is still a nasty, reactionary, right-wing whinge about how they come here to steal our jobs and ruin our culture.
The difference, in this case, between curtailing and questioning is that he would curtail immigration IF HE COULD.