I don't know how you can say this, when they were/are one of the main drivers? Did anyone ban Hillary Clinton from speaking? No. But, nevermind characters such as Alex Jones etc, they banned the sitting president from speaking on their platform!
Whatever your political position, I find it amazing that banning opinions that you disagree with seems to be acceptable or even desired. It used to be that people would say: I don't agree with you, but I'll fight for your right to say what you want.
Instead, it seems everyone wants to live in a comfortable echo chamber, parroting the apparent consensus opinions. So it comes as a shock to them when someone says something different.
People should try to become a bit more resilient of diverse opinions, rather than insisting on an imagined right to fragile homogeneity.