On the contrary. Its completely acceptable for PDP to say whatever he hell he wants. The problem is that he wants to be paid by Disney while doing it.
The USA has freedom of speech. PDP is legally allowed to say whatever he wants. Unfortunately, PDP's revenue stream is (or perhaps... was...) Disney. And Walt Disney did not like PDP's Jew jokes.
There's no censorship here. This is PDP losing a financial sponsor / financial backer. Welcome to the real world PDP, your sponsors actually care about what you say.
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Wall Street Journal can do whatever. People have made fun of PDP all the time in the past years. That's not what's hurting him right now. Its the loss of Disney as a sponsor.