It’s good to keep this top of mind as you go through your day (and your life). Just because someone doesn’t agree with what you do, say or believe, does not mean anything other that you have a different perspective. It’s good to refrain from judging you or them to be “right” or “wrong.”
Do not jump into your ego and put them down. Do not subordinate to their opinion and devalue yourself. Especially don’t waste your time trying to convince anyone of your value as your time, words and energy are sacred gifts. Instead, take a deep breath and just be you. Your value and your happiness lie in how you see yourself.