We should be extraditing him to the country where he broke the law. If it’s legal over there, well… that’s shit and we should put pressure on them to change that.
But, while his actions are completely morally repugnant and he should be removed from society, I’m not clear on what law he broke in the US.
Maybe it’s illegal to travel through federal land (airports) with the intent to rape? But if that’s the case, we may need to shut down our military airports.