Collective Work and Responsibility

Lots of times when I bring up Kwanzaa to my family and friends, they react in one of a few ways:

The sigh: You know the sigh, it’s the: “not this shit again,” sigh. The: “here you go on that Black shit again.” sigh. Or the: “why you trying to take away Christmas from me?” sigh
The awkward silence: You know the blank stare and “why you have to bring this up again” silence. Or the maybe if I just don’t respond you will stop talking silence.
This shit is made up defense: This is my favorite, people will argue to me that this holiday is made up and therefore we don’t need to celebrate it. Ummmmm, aren’t all holidays made the f up. So, because this was made up in our lifetime means that it isn’t valid?