Zionism is older than the state of Israel. It is a political movement consisting mainly of christians.

If you want to learn more you could do worse than follow Zachary Foster's lectures for the Rutgers Center:

https://www.youtube.com/results?search_query=zachary+foster+...

The podcast The Empire Never Ended has recently finished a rather good series on Meir Kahane, one of the most important influences on contemporary zionism:

https://www.patreon.com/tenepod