> Destroy your society today so it doesn't get potentially destroyed in 30 years is certainly a take.

Immigrants coming in today aren't 'destroying society'.

And it's not 'potentially'. It's certainly. Nativists have no answers to it, and if they actually presented the dilemma of 'We can keep Pablo out, and also anyone currently under the age of 40 will have to work until they are 75', not a single person would give their ideas a moment of thought.

> It's roads. Hospitals. Schools. Sewers. Power lines. Everything needs to be rebuilt.

Why does it need to be rebuilt on anything beyond a regular depreciation schedule in a steady-population situation?

And by the way - Canada needs to invite at least half a million people a year in order to maintain the population at a steady-state. That number is the table stakes.