I remember asking an American vet what the communication style was within the US military and he said, "Someone who outranks you tells you what to do and there's always someone who outranks you."
How you would describe the communication style within the IDF?
It depends on your commander, you can buff your commander and tell him he is suggesting something stupid, though if he pushes it you have no real option but to do it. Though if the specific commander was all too happy to assert his rank you knew not to bother.
I guess it also depends on what unit you are in, there is likely a very big difference between fighting units (infantry, armor, artillery) with which I'm more familiar and the back-office units.
How you would describe the communication style within the IDF?