If Canada, a soverign nation, were to allow a terrorist group to set up camp in southern Ontario, and they used that base to launch rockets at Detroit what would be the response of the USA? If Canada refused or was unable to control them would the USA invade and if so would it be justified? Would they call bombing Detroit an act of war?
This is the basket case that is the middle east.
If your neighbours don't throw rocks at your house, perhaps you won't feel the need to to throw bricks at theirs!