First, it was your local progressive school, then youtube clips.
A Libertarian man defends individual liberty. Such liberty allows other people freedom to separate themselves from the rest if they choose to. Therefore, Libertarians cannot have any problem with Zionism. Surely, Blue Republicans, populists and progressives can. Israeli-Palestinian conflict is not about individual rights - it is groups demand conflict for the land.
Lastly, use dictionary to improve your basic knowledge. "Semite" and "anti-Semite" historically have different meaning. There are always two separate entries in a dictionary. Prefix anti- does not carry its usual meaning here.