Israel has the right to defend itself.
If the mayor of Toronto and a squad of Toronto police officers break into your home and kill your family members, you don't get to nuke downtown Toronto and kill tens of thousands in retaliation. There's no justification.
If Canada attacked the US , then yes we’d invade and occupy it until regime change was completed . Also it would not be ethnic cleansing for us to warn civilians in cities to leave before we invaded it because doing so would save lives.
This is party of the ridiculous standards the left puts on Israel :
- If Israel warns civilians in a particular city to leave before they attack - The left yells how Israel is committing ethnic cleansing
- If Israel does not warn civilians to leave - The left accuses Israel of intentionally killing civilians and committing genocide