The Klingon was just exercising free speech. The U.S. Supreme Court has declared money and some actions as speech so could Scotty taking a punch at the Klingon be considered speech? Yes this is slightly tongue in cheek or moderate

Freedom of speech includes the right:

Not to speak (specifically, the right not to salute the flag).
West Virginia Board of Education v. Barnette, 319 U.S. 624 (1943).
Of students to wear black armbands to school to protest a war (“Students do not shed their constitutional rights at the schoolhouse gate.”).
Tinker v. Des Moines, 393 U.S. 503 (1969).
To use certain offensive words and phrases to convey political messages.
Cohen v. California, 403 U.S. 15 (1971).
To contribute money (under certain circumstances) to political campaigns.
Buckley v. Valeo, 424 U.S. 1 (1976).
To advertise commercial products and professional services (with some restrictions).
Virginia Board of Pharmacy v. Virginia Consumer Council, 425 U.S. 748 (1976); Bates v. State Bar of Arizona, 433 U.S. 350 (1977).
To engage in symbolic speech, (e.g., burning the flag in protest).
Texas v. Johnson, 491 U.S. 397 (1989); United States v. Eichman, 496 U.S. 310 (1990).

Freedom of speech does not include the right:

To incite actions that would harm others (e.g., “[S]hout[ing] ‘fire’ in a crowded theater.”).
Schenck v. United States, 249 U.S. 47 (1919).
To make or distribute obscene materials.
Roth v. United States, 354 U.S. 476 (1957).
To burn draft cards as an anti-war protest.
United States v. O’Brien, 391 U.S. 367 (1968).
To permit students to print articles in a school newspaper over the objections of the school administration.
Hazelwood School District v. Kuhlmeier, 484 U.S. 260 (1988).
Of students to make an obscene speech at a school-sponsored event.
Bethel School District #43 v. Fraser, 478 U.S. 675 (1986).
Of students to advocate illegal drug use at a school-sponsored event.
Morse v. Frederick, __ U.S. __ (2007).
http://www.uscourts.gov/educational-resources/get-involved/constitution-activities/first-amendment/free-speech.aspx

pointed and terrible things, particularly about LGBT parents, mothers included. When he says gay people are disordered and influenced by demons, he is attacking many including many people's mothers.

So he claims the right to trash talk and bad mouth all LGBT people and families, organizations and communities but....any slight to himself might get a punch in the nose.
He claims that is a Christian teaching, he's a fucking liar. That's his own bullshit being sold as God's word. What a deeply hypocritical man he is, it stuns me that people are not just repulsed by those self serving and frankly heretical words.