Hamas has vowed to destroy Israel. So?

Hamas has vowed to destroy Israel. You hear it all the time from Israeli representatives and pro-Israeli pundits say it all the time.  So my question is, so?  Seriously how is that going to happen? War game that out for me. Hamas has an army, if you want to call it that, of 9 to 15,000 soldiers. It has no armor or air force; while the IDF, Israeli Defense Force, has an army of around 750,000l, tanks, armor personal carries and an Air Force. Hams has missiles that fire and land wherever they land; while Israel has artillery and nuclear weapons, and, thanks to the United States, one of the most technological advanced military’s in the world. Israel spends 57 Billion dollars a year or 6.9% of GDP on defense a year. So my question is how is Hamas going to defeat and destroy the Nation of Israel. War game that out for me. Explain, in detail, how that is going to happen. How does a 3rd rate army of 9 to 15,o00 with no armor or air force defeat Israel?

It is like a 2 year saying to you “I’m going to kick you ass” and then you freaking out about it and tell all your friends about how a 2 year old who is threatening kick your ass, and how you are afraid. Then you go ask your Uncle to buy you guns to protect yourself from the 2 year old.  Really? Israel has the ability to liquidate human being the entire Gaza Strip. They have one the the worlds most strongest military in the world.  So once again, explain to me how Hamas is going to destroy Israel.