I understand that many people view immigration as a sacred cow

Many do, but some don't. And for the ones who don't, there's the PPC.

Prior to covid, PPCers were pretty much single-issue voters. That issue being immigration. So where the PPC was polling at 3-5% on the strength of their anti-mass-immigration stance, if you took that away, you could also subtract the bulk of that 3-5%.

I understand that many people view immigration as a sacred cow

Many do, but some don't. and for the ones who don't, there's the PPC.

Prior to covid, PPCers were pretty much single-issue voters. That issue being immigration. So where the PPC was polling at 3-5% on the strength of their anti-mass-immigration stance, if you took that away, you could also subtract the bulk of that 3-5%.