Naturally.
I will concede to them that it wasn't like the entire crowd was doing it. But it was well more than just a handful of fans. To be able to hear it in the video over the noise of the arena, and those who were there in the crowd, it appears to still at least be a pretty good size group of people chanting it.
I'm all for chanting and getting inside the head of someone shooting free throws, I love a good chant, but using a recently deceased grandmother as the basis for your chant? Absolutely tasteless, disgusting and classless. There are lines you don't cross and that pole vaulted over the damn line.