I just had a heated argument with an older colleague. We're fine. But I kinda wish that person had seen this wonderful clip:
My favorite part of the clip is when she said, when somebody disagree with us, we first assume they are ignorant. When we realize they know the same facts, then we assume they are stupid. When we realize they are not stupid, then we assume they are evil. My tip is this: if you are talking to a younger person, it is fine to agree to disagree.