The fact that 4chan and Stormfront continue to exist is proof that no one's speech is being stifled. No one is entitled to these services. On top of this, this is also a business decision. Imagine the negative press that might come out if these platforms continue to host Parler. How many other customers might they lose as a result? Boycotts happen all the time, and why should any company stick their neck out for Parler? I guarantee no one at Apple, Google, or AWS made this decision because they felt it was "the moral thing to do."

Similarly, FOX News is under no obligation to broadcast "all opinions." There is no real distinction in this case.