Jews ... at least religious Jews ... have always place their faith in G-d. The trouble is ... for the past several thousand years, G-d hasn't been super good at swooping in and saving the day. His record for saving the Jewish people has to be balanced against the number of times he allowed us to teeter of the brink of annihilation.
Let's just say ... a faith in Hashem alongside an F-35 and a Merkava is probably more reliable than just a faith in Hashem.
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But, God told the chosen people to kill all the other Canaanite tribes and take their land.