1: It wasn't doctored. The quotes from Reagan are true- they are historical fact. I was quoting Reagan regarding Tariffs back in late April early May from that same speech.
2: It was NOT done by Canada, it was done by a Premier of the province of Ontario.
He does NOT speak for Canada- he speaks for Ontario which has been particularly hard hit with the steel, aluminum and car industries. A lot of workers that are now looking for other employment.
Rather like the Kentucky distillers whose industry is particularly hard hit after the Canadian boycott from Trump's demands that we become his "cherished 51st State". Who knew we drank all the booze out of Kentucky?

I sure didn't until the distillers took out ads begging us to quit with the boycott. Oh and those ads? Most of Canada feels sorry for them, and wishes it hadn't got to this.
While it was tactless of Doug Ford, it is true. Reagan said those words, in that context.
That demand to annex Canada
-(why is that ok? but quoting Reagan isn't?)
That demand to annex Canada- actually interfered in our elections, but most Americans persisted in seeing it as a joke. Canadians were supposed to take it in stride, laugh along and ignore another country threatening us.
If Russia or China threatened America would you laugh? When it's repeated, over and over would you still laugh it off?
Now when a provincial leader (equivalent to a governor like Gavin Newsome of California) takes out an ad quoting Reagan the world comes to an end?
I highly doubt that it would swing the Supreme Court the way Trump's actions swung our last election. We survived losing our best hope of a conservative leader in decades.
He will survive the Supreme Court deciding whether or not the Tariffs are constitutional. For the record I think he will win that case.
I suggest that everyone take Doug Ford like the rest of Canada does- one who opens his mouth to change feet.
And speaking of Gavin in California and some other States Governors - they take out ads all the time in Canada begging our tourists to come back etc but we don't treat it like an act of war. Any more than the Kentucky distillers. We feel sympathy for them. This is not easy.
Trump needs to take a chill pill! And own up to his part in the mess between our countries.
Sadly
@Tall Timbers observation above is very true. We are 1/10th your size. We will take a horrific hit from this because Trump is thin skinned, and will take it out of what he sees as his enemies (which he has seen Canada as from day 1 sadly) to the last drop of satisfaction.