I can honestly agree with this idea but I feel you'll need to do a lot more than just kill cops and soldiers... The citizenry of the USA is heavily indoctrinated and worse still are extremely aggressive. If they're not openly hostile they'll be covertly hostile and it will take time and effort from both within and without to break that spirit. Remember, the Nazi's got their ideas from the USA and it's ancestors in Europe... It took 2 world wars and an unimaginable amount of dead to break the Europeans lust for war and even now it slowly is coming back, imagine what it will take to break the USA, a nation that has never had to fight for its life really ever.