From Wikipedia:
> Hate speech - outside the law, is speech that attacks a person or group on the basis of attributes such as gender, ethnic origin, religion, race, disability, or sexual orientation.
"Marginalized political views" isn't in that list, but then again it doesn't purport to be a comprehensive list.
However, it seems like you're relying on a particularly legalistic view of what "hate speech" is. Is hateful speech toward a group truly not "hate speech" until a legislative act deems the group protected? On face, that doesn't seem right.
You're right about "hate speech" as a legal term, but I don't think the CEO of a non-profit speaking to his employees requires that level of scrutiny.