I see this term so often misused and misunderstood; I feel the need to explain the term. A Zionist is someone that believes that Jerusalem is the city ZION or SION of David marked as the seat of YHVH, the GOD or Elohim ( El of 0's = over all or everything). The only concern of a Zionist is to return to Zion and reestablish a connection to YHVH and to rebuild the temple of YHVH.
Are there Zionists that want to take over the world? Of course. Just as there are Christians and Muslims and Hindus and Atheists that want to take over the world. It's a PERSON thing, not a religious thing.
The Elders of Zion document, often cited as the proof of a Zionist conspiracy to take over the world. Is not a forgery but a propaganda tool. It is very easy to trace the origin of the document. Nevertheless, as I said, there are many individuals and groups that want to take over the world. Many people of many faiths.
Remember one of the guidelines when actually trying to take over the world. Is to divert the attention of the masses while doing the very thing they accuse others of doing.