I feel like you're being downvoted for the first sentence, so let me try to elaborate on your point. That's the entire deal of fascists: take something that has no negative connotation and give it one. It's how they make their way to the public space.
It started with swastikas, but there are other, way more recent examples: Pepe started as a meme, "kek" started as a meme. They didn't stop there, of course, they have a bunch of failed examples: they've tried to own rainbow flags ("each race in its own space"), OK emoji ("it's okay to be white"), the term antifa (appropriated to some imaginary paramilitary group instead of an actual definition of anti-fascists), and even the fucking # (this one is especially dumb).
An OK emoji on its own doesn't mean anything. NZ shooter showing the OK sign in court does: https://i2-prod.mirror.co.uk/incoming/article14142992.ece/AL...
So, when you look at the example of someone using these signs, you need to search through their history to see the context. They know their views are unacceptable by the general public, their entire deal is to be on the brick of plausible deniability and then laugh at people who call them out. That's why "everyone's a nazi" is a meme. They want the term "nazi" gone. It's not difficult to see why, since "nazi" was always an insult to fascists. Their attempt at appropriation of the term "antifa" is them trying to do the same for the complete opposite. It's also why they tend to have more profiles: one pretty obviously fascist, and multiple profiles in which they pretend that they're someone else (women, people of color, LGBT+ etc.) while spewing fascist talking points and retaining plausible deniability.
Outright banning just the symbols goes in their favor. In their recent crackdown, YouTube decided to remove almost every video showing swastikas. Of course, you'll rarely see a fascist openly using swastikas. It's those debunking them, laughing at them, and looking at their history that had their videos removed, while they go on and on with "YouTube is leftist and no leftist content ever gets removed".