becomes dishonest and abusive, it can be destructive to stay in such a relationship. The abuser knows they can get away with their abuse, and the abused just keeps being abused and beaten down.

How do you love or respect people who don't love or respect you? Or keep a commitment that they do not?

Relationships have to be a two-way street, IMO.

It would be like telling someone who voted for Trump that they must continue to vote for and support him, even though he has broken every promise and semblance of human decency.

Very destructive and unhealthy to stay in such a relationship. JMO