Trump threatens to unleash the military in the US. When will the generals speak out?

Peter Bergen wrote an article in CNN on military generals speaking out against Trump.

Not since one of President Donald Trump's heroes, Gen. Douglas MacArthur, led a mounted charge in 1932 to disperse an encampment of homeless veterans just outside the White House has the country seen such an application of violence against unarmed protesters outside "the People's House." On Monday evening police, with National Guard troops in reserve, attacked peaceful protesters gathered outside the White House with rubber bullets and tear gas. It's the kind of scene we associate with dictatorships, not western democracies.

We need more senior retired generals to say that violence against peaceful protesters is unacceptable and that using the US military aside from the national guard to police protests is fundamentally an un-American idea.