Did you even read it? Sounds like the ADL's problem is with the white supremacists using this slogan to spread hate.

The phrase “It’s Okay To Be White” is a slogan popularized in late 2017 as a trolling campaign by members of the controversial discussion forum 4chan.

actual white supremacists quickly began to promote the campaign—often adding Internet links to white supremacist websites

Do you think if hateful X supremists use "have a nice day" as a signal for "kill all Y people".....then would you complain 'hurr durr now they're saying you can't tell people to have a nice day'

Edit - actually it's YOU u/Oyveygoyim, who first tipped me off to the fact that white supremists are using this phrase to spread links to their websites.

According to your standard of logic, it's actually YOU who is telling us that "It's Okay To Be White" is hate speech.

So don't blame the ADL, it's actually you who is telling people that this is hate speech. According to the same measurement you held the ADL to, where even informing you about what the white supremacists are doing is akin to banning a phrase - by simply informing me about this, you're guilty of censorship