Intimidation is not a freedom. But displaying a flag is not intimidation.
Yes it is if that flag represents white supremacy and slavery, which you said it does.
It's like I've said countless times; if I flew a flag in your face that depicted your burning house and the charred corpses of your family, with me dancing it around it holding a lit match and gas can, and flew that flag everywhere you went, all the time, for your entire life, you'd go running to the cops so fast, you'd have no time to put sandals on over your socks.
You are the one who wants to ban flags and symbols and thinks a flag can be a tool of intimidation.
I'm not solely the one who thinks the flag is a tool of intimidation; the people who do and did think that. That's why they do it. That's why they put up all those monuments. That's why they incorporated it into their state flags. That was the intent. We know this, because they said so.
But I guess the campaign to erase that history was successful because here you are, dumbly ignorant of it.