Simply being aware of the situation is half the battle. It's unfortunate your parents are brainwashed NPC's, but it is what it is and it should not be your battle to fight. Confronting reality is something they have to do themselves. When their own logic conflicts with their perceived version of reality.. that is usually when you have a small chance to drop little red pills for them to digest. You can't start carpet bombing them with truth, it wont work. They will reject everything you have to say, regardless how true and obvious it is and respond with their feelings. They have to start questioning things and thinking logically on their own. Until then, they are very happy inside the matrix. The truth simply won't be for everyone.

Going back n forth with them probably isn't in your best interest if they aren't smart enough to realize CNN is propaganda. I would suggest just focus on building yourself so you can get out of that situation and not have to deal with it daily. If you aren't working, then get a job that's walking or biking distance. Save what you can and get yourself self sufficient until you can move out and get some roommates. In the meantime, don't try to start any unnecessary battles. Liberals don't respond well to logic, they only respond with flaky emotions and victimhood.

At the end of the day, they are still your parents and I'm sure they love you. Be cordial and simply don't discuss politics or anything that's triggering for them. If they start with some shit, simply do not engage. You aren't obligated to respond to their crazy. Good luck