[TMWNN]

>It’s because when the US thought it could invade and conquer, they were thoroughly trounced and had their original White House burned down

By the British, not by "Canada" (which didn't exist).

To put another way, even had the US not invaded British North America, the UK would still have attacked Washington as part of the overall war. The one did not cause the other.

[mikrl]

Did the landmass change? Canada is a successor nation to British North America.

The strategic reasons for a potential attack are similar, and the same risks remain.

The US invaded and failed. Had they succeeded I doubt the British would invade Washington vs strengthening their position in the remaining colonies.