I want to be the one to point out that retired generals making political statements is heavily frowned upon, so for them to take a step beyond that and ENDORSE A CANDIDATE is practically unheard of except in fringe cases like Michael Flynn.
Upper brass is a pretty exclusive club, and retirees don't generally make political statements to avoid stepping on the toes of the currently serving generals/admirals. If multiple generals/admirals felt the need to take this step, they would've done it with the knowledge and consent of current leadership.
I feel like there is a difference between voting for someone and voting against someone.
I don't like how noted war criminal amd possible lizard person Dick Cheney endorsed Harris, but Cheney has never said, "I like what Harris is going to do"; instead, he tried to frame it as a vote against Trump because...well, it's Trump.
And of course, right-wingers don't have any capability for self-reflection, because the proper response to fucking Dick Cheney calling you evil is to look in the mirror and ask yourself some hard questions.