This isn't a tenant of 'the left' but rather of liberalism.
Deference to law, police and morals that adhere to the legality of action are liberal brain rot, only the left in so far as the right is fascism.
Being on the left often carries pacifist sentiment but deference to legality and unwillingness to act is a liberal tendency.
You say that as if half of the people in their home country don't want to do the same shit?