Perhaps I am simply projecting incorrectly the Latin American experience onto Canada.
In South and Central America, the dominant settlers had RC as a very strong state religion; the Catholics were first in; the first known massacre was excused on the grounds of a native chief refusing to acknowledge the crucifix. No competing churches.
In Canada, as in the US, the dominant imperial power was Britain. Even "high church" Anglicans, whose ritual you can hardly tell apart from the Catholics', profess to be Protestant, and despise papists. In Upper Canada, just as in the US, Irish and European Catholics were treated as second-class citizens well into the 20th century. When the US got its first Irish Catholic president in 1960, it was a very big deal. By that time, we had, of course, had had two francophone prime ministers with strong RC voter support.
It is a difficult topic to discuss in short forum speak form, but given that a large percentage of the world does not agree with what we in the West consider Universal rights (eg. 25% adhere to Islamic beliefs) and human rights evangelism by force will not go down well.
I realize that. Humane values can't be enforced on autonomous nations; they each have to find their own path. However, when individuals move from one country to another, they must abide by the standing laws and mores of the host nation, rather than expect to have their cultural standards accommodated. If they want changes in attitude, they'll have to bring it about through persuasion and legitimate political representation. They are usually unmolested in their lawful assembly, worship, labours and pursuit of happiness - but they're not allowed to kill, maim or damage their children, who are now - just as they are - members of a different, larger community, which extends them its protection - just as it does to them, when other ethnic or religious minorities take exception to their culture.
By strict definition ethnic cleansing has not occurred in Canada, nor has genocide.
Cleansing, no; genocide and attempted genocide, yes. They're not the same thing. Cultural suppression most certainly
is an aspect of genocide - it's just a bit more subtle than causing a famine or plague; a lot more subtle than setting a village on fire; almost as subtle as selling whiskey to humiliated and dispossessed men. All of those things were done here, as in the US. Settlers needed land.
forced assimilation ( not integration ), is essentially the same thing.
I honestly can't imagine the assimilation of a people without integrating the persons.