These platforms are being used by white nationalists and other extremists to normalize their hateful ideology and encourage violence against anyone with different gender orientations, nationality, ethnicity, or religious beliefs.
Gab and Parler have zero interest in free speech as a human right. They want unlimited free speech for acceptable groups (mostly white straight Christians) and no rights for anyone else.
Users on those platforms have posted their intent to hurt and kill others, that content was never moderated, and those users carried out acts of violence. Companies who don't want to be associated with that have disconnected their services ahead of the inevitable legal action to shut the services down.
Literally no one in the US has had their electricity or phone cut off because of a "disagreeable blog post." It's a ridiculous example to bring up in the sea of information about what's going on in those forums.