False. You can see this from the number of losses they suffered in their military campaigns: a tiny number of casualties compared to those inflicted to their enemies. Besides, it has been clear for many decades that the US would do absolutely anything to protect Israel, which means that the forces Israel can count on to defend itself in case of a real existential threat are basically those of the entire USA.

Define "recently". They absolutely wrecked their next-door neighbors in the Six-Day War and that was over half a century ago.

They came very close to a defeat in the first Yom Kippur war.