Boe Jiden will probably sue you for defamation.

The courts will very likely give him the win, slamming you with a hefty fine and perhaps more such as prison time depending on the damages your speech incurred.

You can say Boe Jiden is a purple Martian born in Backwaterstan again, so long as you're fine going through that rigmarole again though you'll probably face even heftier penalties.

You are in no way prevented from voicing your thoughts because the 1st Amendment guarantees your right to do so. You can only ever be prosecuted for the consequences, such as the fallout from making false statements.