Israel was founded as a secular colonial project, most religious Jews at the time thought that taking back their ancestral land by force was basically sacrilege, and many who didn't move there still think this way. Herzl basically imagined Israel as this secular "beacon" of enlightened European values among the "savage" and superstitious Arabs. Zionists sometimes will use the Hebrew Bible to justify their genocide, but they don't actually give a shit about religion, you don't have to follow Judaism to move there, only be ethnically Jewish (and European, they don't like non white Jews either), they mostly say shit like that because evangelicals keep falling for it.