It is difficult to take anyone worried about the US seriously when their solution to protect themselves is to move to Canada.

Not saying anyone's right or wrong but the idea that, should America go psycho, Canada would somehow be okay is a pipe dream. Canada is essentially an outpost of the United States. Yes, I have Canadian family (even old stock "Loyalist" Canadian family) and they all feel the same way.

People need to be real.

If you actually want to be able to declare independence from America you'd need citizenship in a country with actual nuclear capability. France, the UK, China, etc

It's a step improvement: It gets you over the border to a comparable place while being close enough to family for now. The risk of "borders are secure now, nobody gets to leave" is non-zero in the US' future. The way political litmus tests are affecting civil rights here is scary as hell too.

On the military angle, I'd much rather live in a country without nukes. But I'm willing to kick the nuclear blackmail risk can down the road, my own government's threats are way more immediate.