If the US has laws that forbid that, and other nations have laws that establish that, then the US military being used for police activities is threatening to de

If the US has laws that forbid that, and other nations have laws that establish that, then the US military being used for police activities is threatening to democracy - or at least to the rule of law - in a way that it is not threatening in other countries. Other countries can do that if they want. It may or may not be a threat to them. But in the US, it's absolutely a threat to democracy, because it's already the executive deploying the military against the law.