Is Zionism a form of white supremacy?
No. It's the desire for jews to be able to be able to live in their ancestral home and have one country where they can feel safe.
There are extreme versions of zionism that have unacceptable aspects, but zionism itself is just that.
You can be a zionist and still strongly believe that Palestinians deserve nationhood too.
Most jews (not all) are one type of zionist or another in that they believe in Israel's right to exist.
The desire to paint zionism as a unique evil (often equated to apartheid or nazism by morons) is racist because most jews around the world feel a connection to Israel. Half of the world's small population live there, and many have family connections.
I've met one person who was comfortable using the word 'zio-bitch' (that idiot McKola used this term as well if i recall) but was outraged by the suggestion they were antisemitic. Yet that phrase will cause most Jewish women around the world, including the many that are peace-loving, two states supporting, or even mostly indifferent to Israel, to recoil in horror and fear.
The crimes of Israel, and there are crimes, are those of government, army and statehood, not ideology.