Good question. At the level of the national party, I'd say 1) categorical opposition to all immigration enforcement, 2) land acknowledgements and other anti-American rhetoric, 3) willingness to countenance explicit racial discrimination in violation of the Civil Rights Act of 1964 (and/or the 14th Amendment), and 4) various minor positions on trans issues. In terms of what people vote on, I'd say immigration and racial discrimination are much more important than land acknowledgements or trans issues. In terms of the actual future of the nation, I'd say that the ideology behind land acknowledgments -- which views America as a fundamentally illegitimate settler-colonialist entity whose dissolution is the only true path to historical and global justice -- is far more dangerous and damaging. At the local level, there is some extremism connected to the Palestine movement, which is both deeply antisemitic and deeply anti-American.