It's not their sovereign land, except in the sense that the entirety of the US is 'their land.' Tribes are sovereign over their own land and BAJAA does not change that. It is common for tribes to litigate things outside of their own lands and administered by/for the public, for instance this landmark case https://en.wikipedia.org/wiki/Navajo_Nation_v._United_States...

Some cases that have won use RFRA to legally discriminate against minorities by Evangelical Christians. Native Americans bring lawsuits based on their religion over a sacred site and reclaimed water, just like anyone else can, and yet losing "this landmark case" somehow proves they have too much power?

It really does though. And you are misattributing the why you don't have to give shit about their "bullshit superstitions". Are you from the US? This is taught in grade school...

> Thats the whole point(major point) of how this country was founded, religious freedom from the government.

I would be very happy if we repealed the RFRA and returned to the well established case law for fundamental 1st amendment protections.

Would you personally be A-OK with tonnes of treated sewerage being dumped upshed from your drinking water extraction point?

Responsible elders / leaders are expected to to do their best to slow roll or stop such changes being made - once it becomes routine its much harder to stop as problems present.

What if they only ran the transmission lines behind their eyesore casinos?

There are plenty of other laws available to prevent various things from happening. The difference is that those need a government prosecutor to initiate a case rather than letting every member of the public file a nuisance lawsuit. Which they would do in your "someone trying to run HVDC through the Grand Canyon" scenario and any other sufficiently egregious case, but not do when someone is just trying to build a boring wind farm on some boring land they own.