Originally Posted by
Axolotl
Except that's exactly how they operated in the books calmy, carefully taking control of everything step by step until they had absolute authority. They could cover up their actions just fine. And if the muggles catch on what can they do? Their armies have already gone, their enemy is litterally impossible to identify and any violence they try will be directed at the wrong people, if anything it would only aid Voldemort's plan by further spreading chaos and paranoia amoung the muggle world.