There need to be strong penalties for abuse of law enforcement power. He has the power to destroy lives and families, apparently without any accountability. The way you hold people accountable for their actions is by threat of legal action against them.

Abuse of power and being unreasonable are not good traits in any branch of law enforcement (which is where I assume this officer would end up if not at the border).

Sure. I just think that 'lock him up' is not the solution to non-violent crime. The US has higher incarceration rates than any other developed country. It's expensive and wasteful of labour.