It’s unreal how people do not understand the difference between defending a homeland, invading a country via an easily traversable large land border, attacking a country across a geographic barrier and attacking a country in a whole different part of the world. Israel’s ability to threaten mainland Europe would not amount to anything beyond terrorism, though potentially nuclear terrorism. All of Nazi Germany, fielding the industrial capacity of most of Europe was probably not capable of successfully invading even the UK across the English Channel, even if they weren’t distracted on the Eastern Front. They simply didn’t have the naval power required.