Abused an Uncle for Spitting Water from His Car—Was I Justified?

After a rough month, my friend and I went for a ride to clear our minds. On an empty road, a car in front suddenly slowed down and lowered his window. I was on the right side of his vehicle and a little behind him when the driver, a man in his 40s, casually spat water right in front of us. Luckily, none of it landed on us, but the sheer audacity was infuriating. What made it worse? His expression. He looked proud of what he did, like he had done nothing wrong. And when I confronted him, he smugly replied, "Kya kiya? Thooka na bas." (What did I do? I just spit.) It wasn’t just his attitude that got to me—it was the fact that he was driving a nice car and dressed in decent clothes, giving the impression of someone from a well-off background. This wasn’t some uneducated person who didn’t know better. He was someone who, by all means, should have had basic manners and social responsibility—yet, he didn’t care at all. That was it—I lost it and started abusing him, which came very naturally at that moment. The frustration of the past month just triggered something in me, or else I wouldn’t have reacted that way. He fired back, but it ended there. Looking back, I feel disappointed in myself. Maybe I could have handled it better. But at the same time, why do people—especially those who should know better—think it's okay to do such disgusting things in public? What do you guys think? Was my reaction justified, or should I have handled it differently?