Just wondering if this is a Narcissistic thing. I do this myself. If I feel that someone's feelings about something I did are silly, I personally see no reason to change the behavior. However, If someone were to invalidate or minimize my feelings about something, I get defensive

In situations where I invalidate, I simply can't help but to see the other person's feeling as silly (or whatever I see them as), That's just how my brain is wired.