intro college coursework generally repeats everything that was taught in highschool. any setback will be minimal
more importantly, there is nothing incorrect about the vast majority of the changes. try being a grown up. for example, there is no shortage of historians that would take the position that McCarthyism was justified and not a paranoid witch hunt. many, if not most, Soviet historians and probably most of the Soviet FSO would take this position. In fact much of McCarthy's criticism had roots in Soviet propaganda. TX's position is many times more realistic and scholarly than the general teaching in public schools that ideologically brushes off McCarthysm as an attack on civil rights without even paying lip service to historical context.
liberal crybabies are upset because their pseudo-intellectual monopoly is being taken away, not because of inaccuracies in the revised curriculum