In two easy steps.
Don't tell me to "Calm down" when all I'm doing is disagreeing with you. Especially after I've previously told you that I don't like it.
Don't tell me that I'm "Making a scene" when I'm neither raising my voice, gesticulating wildly or even standing up. If you would like, I can show you just what I would look like making a scene. I'm fairly certain that you wouldn't like it, but you would By God know the fucking difference once I was done.
Instead, let us agree to treat one another like business associates: polite and formal. Let us not pretend to unwarranted familiarity. You don't actually know me anymore and I do not know, nor do I wish to know you. Notice how I do not presume to tell you what you like or do not like based on data twenty years out of date.
Failing that, let's just avoid one another because if I have to keep being nice to you for the sake of mutual relatives I'm going to blow a fucking gasket.