Maybe it's because Tucker Carlson has something else in common with Donald Trump in that he is incessantly and relentlessly attacked, and many of these attacks have gone way beyond verbal. Carlson and his family members have been harassed and assaulted and his livelihood is under constant attack by countless entities mostly from the left, but also from the right. Millions have been spent to get him off the air, and he has been investigated by the FBI and the NSA. Carlson has become the most feared conservative political pundit in the USA and these entities have demonstrated that they will do anything to attempt to destroy and discredit him.
Of course he's using his platform to attack and belittle those whom he feels have it coming. I certainly would.! And, of course he has an agenda, and it has proven to be a fairly successful one in pulling back the curtain on the ENTIRE swamp, not just the lefty swamp dwellers.. If you don't like his style or buy into his rhetoric, you can always change the channel.