I suppose it depends what is meant by "more brutal than the enemy". It wouldn't be hard to make a case that the occupation forces are already in the lead, going by the number of people killed.

That's normally the situation with all miitary occupations which face significant resistance - American, British, French, Russian,German.

It's built into the situation, the same way it's built into the situation that people fighting an occupation are likely to do some terrible things.