No. We've just grown up in a generation in which one party has embraced the politics of racial exclusion and demagoguery of immigrants, gays, and minorities. While another party has embraced diversity, tolerance, and inclusion.
It shouldn't surprise you that if we embraced progressive social policy we would embrace progressive economic policy.
Republicans have lost a generation of voters. And with the increasing diversity of the electorate, a permanent leftist majority is right around the corner.