TV channels that profit from presenting the troll as a freak show are giving support to his power.

The first thing you can do to resist is not to watch.

Whatever the troll says is of no importance. He will say something contradictory tomorrow. Watching him is at best a waste of time. Spend your time on resistance activities.

If you are with friends or relatives that want to watch, take advantage of the opportunity to set a visible example of not joining in. Say, "I'm going to do something useful (or, something I really want to do) instead."