Historically Japan would have executed someone like this and that's not an exaggeration there have been examples in the past. Now is that too authoritarian? maybe .
But Johnny Somali (apparently he's Ethiopian by the way so he even lied about that and his real name is Ramsey Khalid Ismael and he really hates people knowing that for some reason so im putting it out there. ) being a public nuisance , disturbing the public constantly and insulting the country constantly and yet nothing can be done about it because he's technically not breaking the law.
Now imagine tons and tons of people behaving like Johnny Somalis/Ramsey Khalid Ismael and creating public chaos and nothing can be done about it cause they are technically not breaking the law.
Suddenly authoritarianism makes more sense
Authoritarianism becomes necessary when your society has been fractured by multiculturalism. Non-authoritarian societies are built on high trust, shared values, and honor systems. In the absence of government crack down, you need good people who behave well towards each other without the coercive threat of state violence.
All of this is immediately shattered by multiculturalism. The populace becomes tribal and engages in brazen sectarianism. The groups that do not adopt this strategy are rapidly disenfranchised, displaced, and destroyed. Public trust vanishes, honor systems are targeted for abuse, and there are no shared values binding different factions together.
Authoritarianism becomes necessary in such chaos. The only question left is who will wear the boot that stomps on everyone else’s face.