Just because Hezbollah are not atheists does not make them religious fanatics. Sure, they talk about God every sentence but that's just traits from being Muslims. There are Muslims who pray for safety before going into a bathroom. Muslims generally call on God for everything; even where it wouldn't make sense to a Jew, Christian, atheist, etc.
If they were less religious, would you be OK for them defending their land more? You are failing into a trap that the Muslims defending themselves are doing it through religious fanaticism. You are falling into pro-Zionism propaganda. They just happen to be Muslims who are defending themselves while trying to process their actions internally in a way that fits their identity. It's not a religious war; it's Levantine people vs non-Levantine people.