Listen to what he says. Then decide if you agree with his political position or not.
ROTC is, from my experiences many decades ago, "playing soldier" for the first two years, and was designed that way to weed out those that would not fit into the military culture. The second two years were where you were educated on how to be an officer and examined by the military to determine where they would like to put you.
If ROTC is going to be problematical, you can explore the possibilities of OCS after graduation. Depending on your degree you might even get a bit ahead of the ROTC folks (doctors, lawyers, some engineers aree examples).
My concern, for both you and the military, is that you admit to "severe food allergies". The military is very uncaring about tellingf you what is in what they put in front of you to eat, and has little if any desire to prepare a special diet for anybody. That being the case, you need to look at the risk you will be putting yourself at. More importantly, look at the risk you might be creating for anybody under your command. Whether stateside or in combat it is a bother to have your leader suddenly stop leading. Additionally, if you do not die outright you will be taking troops off task to deal with you - generally considered not good for the mission.
stay safe.