Huh?
Laws can change. Your side wants Congress to pass a law to "recognize" this tribe and give them special benefits and exemptions from general laws.
My "side" (didn't realize I had one?) is not trying to pass anything, this is
already the law. If you want to change the way international treaties are negotiated, good luck trying. The baboon is still in office, so the timing has never been better.
The rest of your post is mostly just straight-up inaccurate. Native Americans constitute the poorest demographic in the country, they as individuals are taxed like anyone else (it's tribes as collective entities that are tax-exempt, not citizens) and a very small number of people receive any revenue whatsoever from the 400 or so casinos that are the topic of so much Republican ire. There are more than 5.4 million Native American people in the US, and the vast majority, about 4 in 5, aren't enrolled in a recognized tribe at all, let alone one with a casino business.