>>9
No, but you are free to end any mutual relationship with people you don't approve off.

Your example of strangling people would be equivalent to the employer hunting down the employee and hacking off his/her arms and legs, ensuring (s)he won't be able work again.
Strangling people prevents them from voicing their opinion in the future, as does shooting them. Laying them of doesn't.

Freedom of speech means that the exchange between those who are willing to talk and those who are willing to listen won't be supressed.
It means not that anybody has to give you a platform, that anybody has to listen to or agree with you, or that people are not allowed to judge you based on your statements and adjust their future dealings with you accordingly.