Upon the founding of Hamas, it was weak politically and in military terms. Now Hamas is the strongest Islamic resistance movement in the world.
Hamas has spent time to acquire new weapons which have been displayed the latest attack on Israel.
They have recently used powered gliders to fly terrorists across the border into Israel. They have also started using armed drones, they have also introduced to their arsenal, long-range missiles (rockets). They hit targets in Tel Aviv some 70 kilometers from Gaza.
In comparison, Israel military and security forces are known globally for their intelligence capabilities. Israel airforce is equipped with F-35 stealth fighters, 500 Melkava tanks, missile boats and it is a nuclear power but this might not be relevant in its war with Hamas.