An interesting read. To answer your various questions:

1) I don't care for either of the Avatar films. But nor do I think they are racist. My detailed opinion on the second film can be found here.

https://medium.com/simon-dillon-cinema/film-review-avatar-the-way-of-water-a1ce30ac15a0

2) Dances with Wolves isn't really a white saviour narrative. Yes, it's about a white man going native with a tribe of Sioux, but he doesn't save them. If anything, it is the other way around. More on my thoughts on that here, if you're interested.

https://medium.com/fan-fare/why-i-defend-dances-with-wolves-f5f0266aee

3) I do not kowtow to hive mind groupthink boycott demands when it comes to my entertertainment choices, for any reason whatsoever. Here's a further sample on my related thoughts concerning this matter.

https://simondillon.medium.com/are-we-allowed-cancel-cultures-illusion-of-authority-d68ab8312711