They know trump is weak, panicking and useless. All they have to do to keep their jobs and outlive his regime is nothing. Because just about every coup in the world that didn't have the military backing it has failed.
Besides, would you cooperate with the guy that's cut your funding, destroyed the policies that made you the most effective military on the planet, then called you to a meeting forcing you to travel halfway around the world just to ******* insult you?
If they kiss the ring, they're in violation of their oath and complicit. When trump is out (which won't be long one way or another: his regime collapses when he dies regardless.) the coconspirators will be probably be removed by whatever administration follows.