Who is an extremist? How do you define it?
To progressives, anyone to the right of them is an extremist: which could be the majority of the US.
Is someone who is against abortion an extremist? Someone against homosexual marriage? Someone against gender fluidity nonsense?
http://www.oann.com/eu-to-slap-fines-on-tech-giants-over-failure-to-curb-extremist-content/