[And though I freely admit that this attitude is heavily influenced by the trauma and the legacy of the Holocaust, I reject the notion that this is irrational.] It's not rational to project European traditions of anti-semitism onto other cultures and civilisations. Understandable, but not rational, and arguably not in Israel's best interest.
ISIS kills 22 in Yemen's Sanaa, Aden; targets both gov't and Houthi rebels (Reuters)
from the article: The Holocaust is a good reason, not a bad excuse, for attacking Iran