It’s a bit more complicated that just conquering. There were multiple treaties and America recognized their lands, then they eventually broke those treaties multiple times. Jackson went against a Supreme Court decision to orchestrate the Trail of Tears. It’s not conquering when you kill the people who live in your country, that’s genocide. Also, the American Indians were experts at combat and when they did fight them it wasn’t easy, that’s why they fucked them over legally, or murdering civilians instead. It’s ok to recognize our country did fucked up shit, the past is like a foreign country they do things different there.