The Ninth Circuit approves censorship for liberal tech giants

Does 9th Circuit not know what's in the Constitution, or just ignores it? Either way, now liberal billionaires at Google, Facebook, YouTube, etc. have been given a green light to censor anything (conservative) they find unhelpful. Like individual liberty, a secure border, conservative thought; that kind of thing. The 9th says these public forums are "private." Does the 9th Circuit squint when it sees daylight after spending so much time in the pockets of mega wealthy progressives?