If you support Zionism, you personally might not be a bad person. This goes double for Jewish folks, as Jewish institutions promote a very one sided view of Palestine, and the Holocaust leaves a justified and genuine void of fear and uncertainty that Zionism promises to fill. I'm also not going to be as harsh when it comes to left wing Israelis, because obviously the Israeli state will promote Zionism. It's their literal state ideology. People tend to absorb the ideology of their government.
If you still support Zionism when you understand its history of abuses against Palestinian people, then you almost definitely are a bad person. If you support Zionism to support your Messianic apocalypse fantasy, you are a bad person and also probably an antisemite.
(Sidenote: The rhetoric I sometimes hear about "normalization", while it definitely applies to some people, it is often misplaced. Rabin and the liberal Zionists who cultishly worship the peace process are definitely normalizers who can't be trusted. But not every left wing Israeli is like that, and not every instance of cooperation between Palestinians and Israelis is normalization.)