Because it's all theater. Most of these loonies are extras they just don't know it. It's one giant distraction. A fuckin flea circus. Just make sure you're paying attention so you don't notice your wallet getting lighter or your rights getting smaller.
I wouldn't say ignore them. That is how the loons get their soapbox and make rules that make our lives hell. Remember that it is local government that assists the state government with their gerrymandering and enforcement of abusive laws. Vote for competent, populace-minded local governments and the asshats in the state governments will have more trouble exerting will.