The "they" who entered Palestine int he 7th century are not Jews, they were the extremist Muslim Arabs. You're getting things mixed up. And your mention of "Germany" et al. suggests you aren't aware that modern Jews are just as much genetically descended from the Canaanites as modern Palestinians are: https://medium.com/non-violence/arabs-jews-are-equal-inheritors-of-the-holy-land-e7f70a2e5ea2