Zionism[a] is an ethnocultural nationalist[b] movement that emerged in Europe in the late 19th century that aimed to establish a national home for the Jewish people, pursued through the colonization of Palestine,[2] a region roughly corresponding to the Land of Israel in Judaism,[3] with central importance in Jewish history. Zionists wanted to create a Jewish state in Palestine with as much land, as many Jews, and as few Palestinian Arabs as possible.[4]
In summary, it's a movement that aims at committing genocide in order to obtain a ethno-cultural state where Judaism and Jews are the only accepted and dominant people.
Yes, zionism is bad.