Friends posts on various social media make them out as extremists. Guess it depends on your definition of extremist? People who want to infringe on others rights because they find permitting those rights offensive to their political/religious views and are willing to act on it with either violence, political reform, or anything that restricts the people who are different from them -- are extremist.

Do they do that? Do they want to do that? If so, extremist. If not, not extremist.