If you don’t know much about James Madison, read the Wikipedia article on him first, or do some other research.
My personal opinion on James Madison is that he was the worst president in US history. He wasn’t a bad person though, nobody is (only our choices are bad). But, he made lots an lots of bad choices.
James Madison attacked Canada because they were enjoying the English Empire’s lower taxes and better trade, started a war, got the capitol burned down, and almost lost our country.