It depends why someone is banned. If someone encourages violence, glorifies violence, spreads misinformation that can hurt people, should they be banned?
I am not sure generalizing that democrats have no values, democrats are unethical, etc etc, is a good way to go about having a constructive dialogue. No single group or party is a monolith.
I can offer instances where I thought Republicans were being immoral. But I don't think every Republican is immoral. Know what I mean?