Freedom must be balanced with notions of human rights. Maybe a lot of younger generations see a loss of balance. Maybe they see that a lot of the current freedoms of speech and behavior come at too high a cost on the protections for human rights. Things like targeted hate speech, mass shootings, etc.
Like you want freedom from government, but you also don't want oppression by the majority.
Not saying that's necessarily the case, but could be.
Democracy is a form of freedom (freedom from government in which one is not a participant), and clearly a form of freedom important in the historical American concept of freedom (though, to be fair, it's not just Millenials for whom that had weakened, with the colonial America’s signature protest against norepresentative dictates being co-opted ss a symbol for political forces that are opposed to taxation rather than it’s imposition by nonrepresentative means.)