I think in fact you'll find there's been a huge rightward shift in the tech sector in the US and HN reflects that.
What I'd say is that there is a significant number of "libertarians" whose "liberty" veneer is scratching off and the authoritarian conservative body underneath is starting to show through, as it always does.
Also, most "lefty" US tech workers are "lefty" only on social/cultural issues -- and would not be broadly in favour of socialist or social democratic economic policy... which I guess describes Democrats in the US generally.