Can an 18 year old American with Israeli citizenship join the IDF ?

Yes. Here is the bitter truth too:
You can even train by shooting Palestinian children.Zionists boast about it being one of the best experiences ever in the only democracy in the Middle East.
16-year-old Said Odeh died after being shot in the back twice by Israeli forces in the occupied West Bank.
An Israeli soldier who became the first casualty of the Israeli Defense Forces (IDF) during the latest round of violence against the Palestinians had...