Israel is a barbaric state that survives based on it's occupying another people. They came from foreign lands with the intent to take Palestine from the Arab Palestinians. Herzl's aim was this, even Ben Gurions memoirs and diaries all along proved that the main goal when it's all said and done was to take over the land and get rid of the majority of the peoples who were native indegenious, non Jews i.e Palestinian Arabs. So yeah, Ireland is making a moral decision. If you don't like it, tough fight your own battles but don't draw our nation into this.
from the article: New WikiLeaks revelations show Ireland blocking U.S. arms to Israel