I know you mean well but generally Canadians find it annoying when Americans propose we annex them. This is a common joke we get. But just like we don’t like it when Trump jokes about Canada being the 51st state, we also don’t like it when Americans joke about joining Canada. We like the boundaries between our two countries to be respected. Because we are different cultures, and have very different values/attitudes, and very different legal systems, we don’t always speak the same language (French has equal status to English here, and despite what most Americans think not all French Canadians live in Quebec). And generally we don’t like it when these differences are downplayed. Also, with all due respect, we don’t want to inherit your baggage. We still want to be friends with you guys though! But as different countries.