Trump Jr. Won’t Disclose Russia Talks with President Because Attorney-Client Privilege. Neither...

SSG Robert Webster
1. That statement isn't sexist.
2. "You're".
3. I never indicated otherwise.
4. Are you asking me about my genitalia? Because, ew.

'Dumb brother' is stereotypical, sexist, discriminatory, and demeaning. So yes it is sexist.

No, sexist would be "he's dumb because he's a man."

I'm not aware of any stereotype about dumb brothers.

Discriminatory would be, "he shouldn't speak because he's a dumb man."

Demean:
verb
gerund or present participle: demeaning
cause a severe loss in the dignity of and respect for (someone or something).
"Trump demeans the profession"
synonyms: degrading, humiliating, shameful, mortifying, abject, ignominious, undignified, inglorious
"Donald Trump Jr. creates his own demeaning experiences."
do something that is beneath one's dignity.
synonyms: debase, lower, degrade, discredit, devalue; More
cheapen, abase, humble, humiliate, disgrace, dishonor
"Trump actions demean Americans in the eyes of the world."
antonyms: dignify

SSG Robert Webster

Really? You are not aware of any stereotypes about dumb brothers? Pull my other leg.
And thank you for proving my point with your illustrations of the meaning of demean, showing your bias.

I don’t think it’d be illegal. People make all kinds of defenses and justifications in court all the time.

Making in valid defense is perfectly legal lying under oath is a major felony