There is a misconception about what freedom of expression actually means; the delusion lies in the belief that it means one can be unfettered to say whatever, without recourse or opprobrium.
Freedom of expression means a government cannot censure you. Of course, the limits to this right are germane to the constitution of the specific state under whose jurisdiction you are in. Nevertheless, freedom of expression doesn’t inoculate you from repudiation.
We are afforded the right and privilege to express ourselves. You are entitled to your wrong opinion; calling it an opinion doesn’t make it exempt from scrutiny. The idea that a statement being an opinion is an inoculation against criticism is weak, and an exercise in the futile. The term “opinion” is a placeholder for fact or fallacy. If an opinion is informed, then it is simply factual. If an opinion is uninformed, then it should not exist.