I don't like companies colluding to make decisions for me on what opinions (even batshit crazy conspiracy theories no matter their political slant) I get to hear, however, they're private businesses and have every right to allow or ban people of their choosing from using their services. If anyone doesn't agree with their decision they're free not to use those company's services in response.
Pretty simple.
Although, I do get a big kick out of reading all these complete lunatics on Twitter screaming at the CEO for not banning Alex Jones there, too. Again, don't agree with Jack's decision? STOP USING TWITTER.