Should I make amends with my ex-uncle after our conflict at work?

I’ve known my uncle since I was probably 8 or 9 years old. I would visit my aunt and uncle all the time. I was close with him then my actual uncles. Well him and my aunt got a divorce recently. My mother would help them out with their bills. Even in the process of them getting a divorce my mother still helped him. I helped him get a job where I work so now we work together. At work he would talk about my aunt and cousins in a negative way. Saying it’s “your aunt”. So I embarrassed him back and brought the big stack of his bills into work and handed it to him in front of everyone first thing in the morning. I try to keep my family business out of work. But he kept bringing it up.

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by the way because of that he doesn’t speak to me anymore unless he has to. My family and I did a lot for him. My mother screwed her own sister in the divorce to help him because she knows how her sister is.
Should I make amends with my ex-uncle after our conflict at work?
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