The Prophet defeated the enemies of Islam even when he and his followers were small in number.
What use is revelation or religion if it doesnt change anything?
The only model to follow is pure Islam.
Laws are to be enforced justly but firmly, with an iron hand. This is the case anywhere, even in a family.
If the West wants to have peace, then they have to accept Islamic rule.
Likewise the leader of any state has to do the same, he has to enforce Shariah firmly, for he will be held in account later in the afterlife if he fails.