As a Canadian living in and working in America, I have a similar although less dramatic moral difficulty. The fact is that the American government is curiously abusive compared to your average developed national government.
So I assume the positives outweigh the negatives?
Think Canada could do better as the world's police force? Would have Canada handled 911 differently? Would Canada have invaded iraq? Would the middle east be better off without that war? The US takes a lot of heat but by not doing anything would things be worse.
I don't think Canada is ready to handle that responsible. You need to be mature enough to do the good and bad. Canada just wants to do the good anything else that would taint that imagine in the collective mindset wouldn't be acceptable by the dominate few media narrative.
Regional powers are in check. Iran or Iraq were trying to get the bomb. Pakistan and India were on the edge of dropping a bomb on each other. Israel has been trying to get someone to attack Iran.
Keeping warlords in power is easy but longterm it works against your interests. Having a free Iraq has changed the region. It has given voice to oppressed people. It probably has caused Turkey uproar over the Kurds in Turkey wanting to join with the Iraq Kurds. But that is to be expected.. each problem solved will reveal two more.