Israel funded and deliberately strengthened Hamas. Since Israel is the side with economic, technological, logistical and material superiority -
This is entirely their fault.
There is no such thing as a religion having objective "teachings."
It's always been subjective.
Normal people are Jews and Muslims, and extremists like the genocidal Israeli colonizers, and the similarly genocidal Wahhabist/Salafi terrorists are still Jews and Muslims.
There is no "true" understanding of these religions.
Except one is a well armed adult, and the other an abused child.