Food aggression?

My 1yr old boy is having major food obsession, idk if it’s appropriate to call it aggression or anxiety or what to call it. But anytime I have a snack or food or even a drink in front of me he is immediately ALLL over it, trying to climb up to get it, once he realizes he isn’t getting any or I tell him no then he will start screaming crying, sometimes even hitting just throwing a tantrum. Or if he has finished his food for breakfast lunch & dinner he starts screaming crying. And I know there is no way possible that he is still hungry because he will eat a lot. I already give him portions that I think maybe a little bit too much for him but he always finishes & throws a fit when he’s done. Does anyone else experience this? My mom says she’s never had this problem with me or my brother when we were babies so she thinks it’s not normal. ALSO I would like to add that as a mom it is extremely hard for me to say no when he wants my food & I usually give in & end up giving him some off my plate, but I think it’s also important to set some type of boundaries so he doesn’t always expect to eat off my plate or other peoples. & he will always have snacks throughout the day between meals too.