Why are people surprised or shocked by this censorship? Do people seriously believe that things such as YouTube and Facebook are free public services that you have right to?

They are corporate entities set up for one sole purpose - profit.

If suppressing certain political or social outlooks will benefit their chosen political affiliations that have promised to enable them with greater profits, then of course they will do it.

Follow the money trail and you will get your answers.

Don't waster your time or energy on outrage, and invest it in alternative platforms such as Steemit or DTube. That is how you make the greatest change.

“You never change things by fighting the existing reality. To change something, build a new model that makes the existing model obsolete.” ― R. Buckminster