Freedom of speech requires emotional, psychological and intellectual maturity. If one is deficit in any of these areas, freedom of speech may be too much for you to handle, since your brain is not completely right and may distort reality and overreact to fantasy.
For example, Gay pride, black pride and white pride are all the same thing at some level. They all reflect people defining themselves based on narrow superficial criteria. None of these do justice to the person underneath that their mother would know. If you can accept any of these, you should be able to accept them all, since they are all functionally the same. The irrational person may not be able to see this common thread; mask.
Say you had a Nazi, Rebel or Gay Pride Flag; none of these flags can be proven to be portals to the other side, which direct the spirits of the dead, to reincarnate among those who stand near that flag. That would be irrational. The past is the past and cannot be transmigrated to the present through flag spirit portals. Those standing next to such flags, should be judged by their own actions, and not the reincarnated spirits of the past who represent the worse case scenarios to support irrational arguments.
The modern idea of freedom of speech was established by those who wrote the Constitution of the USA. To conceptualize the possibility of free speech implied the founding fathers were mature emotionally, psychologically and intellectually. If not, they would have set PC standards, since all types of thought scenarios would have bothered one or more of them; become grouchy, afraid and angry all the time. They were healthy.
If you analyze the historical time for the conception of modern free speech, only the men voted, paid taxes, and spoke up in public. Women, children and slaves could not vote, did not pay taxes, and were limited in public speech. Although, art home, the wife had freedom of speech with her husband and with other women. It was different for the children. They spoke when spoken too until maturity was reached.
The maturity standard, behind the original freedom of speech concept, was connected to self sufficient adult men. It was also connected to British and Christian traditions, since the founding fathers had connections to variations of both. The Brits were/are noted for their calm control over emotions; stiff upper lip. They were not the fly off the handle type. They were expected to think before acting on emotions. Christianity taught love your enemy; accept the free speech of others even if you disagree. It also taught turn the other cheek; be patient and don't let it get to you. Listen even if you don't agree while not letting it bother you so you can think it through before acting. There is recipe for success when it comes to free speech.
In modern times, other recipes are used that have stripped away many or most of original layers until most fall short of the gold standard. The left is the furtherest away and is a good example of what does not work. The left is more atheist and cannot turn the other cheek or love the enemy so it can remain calm. It is not Brit, but more latino, who can be hot blooded. It is not male, since male is evil and needs to be more feminized. It is not adult since marketing is geared toward youth and not maturity. The result is they may need safe places or PC fortifications.
The proper attitude for free speech is sports. In sports, you play hard and do your best, for yourself, your team and your fans. But you are friends with your opponents when you are done; shake hands. In competition nobody gets hurt, accept by accident. Speech is not war. The fans can take sides but they appreciate a good play by the opponents.