We aren't talking about grocery stores, places of public accommodation, restricted by the CRA, or a highly regulated utility company, often/generally granted a local monopoly. But with a grocery store, I'm aware of no law that would prevent it from posting a sign saying "WE DON'T SERVE BIDEN VOTERS!!!" They can't discriminate based on race, etc. but they can discriminate on political views. In most states, they can refuse to serve racist trash or gays or Democrats or MAGA hat wearers, because those aren't protected by the CRA. Your church can kick out anti-religious trolls, or LGBT, if they want. Etc....
So it's not at all dishonest. You have a right to free speech. You're not obligated on your forum to be neutral. You and your forum can be as hostile to a particular government, president, Congressman, Senator, political party, or viewpoint as you want because the 1A protects your right to free speech, and if it doesn't protect your right to be unbiased towards government in your political speech it is worthless.
FWIW, I don't know why the so-called libertarian, so-called lawyer liked your comment versus explaining the obvious about how the 1A actually works, and the dangers of government getting into the business of enforcing 'neutrality' or requiring a social media company or DP or anywhere else to be 'unbiased.' That's a form of government oppression, in fact. If you and your private forums cannot ruthlessly attack what you perceive as a government/party/movement/supporters engaged in wrongdoing harmful you believe to this great country, what good is 'free speech'?