On the matter of something trite to complain about...Their name? Indigenous is a status not an identity. Of the issues in her statement, those seem the more trite to complain about.
The name of the group she is defending is colloquially known as "Indigenous People". Not "Indegenous folx". I suspect the average Indigenous person reading her tweet would say, "Cancel Thanksgiving? WTF? Me and my family love our time together at Thanksgiving!" Not to mention their bafflement and dismissal of some progressive rando unilaterally using the obscure term "folx" to describe them.
Sure, complaining about "Cancel Thanksgiving" is the bigger fish here, but that notion is so patently absurd from all angles that its up there with the babble coming from a tin foil hat wearing homeless guy. That is, you just sort of listen for a couple of seconds, say "Ooooookay" and quickly move on.
On the matter of something trite to comment on, it's "my family and I", not "me and my family"