They didn't hehehe he hehehehe
Answer: Their are a bunch of people who has helped saved the Jews, but the 2 main were Raoul Wallenburg and Dimitar Peshev.
Explanation: Hope my answer has helped you! :)
Europe would be in contact with lost knowledge sooner that in reality happened. As the arab nations were more civilized than some others, the cities were preserved and the really important work of the romans would be preserved and enhanced. The gods statues were destroyed and Islam would be the only religion.
Farming was difficult due to limited amount of good soil and cropland. Hope this helps.:)
The Answer is Auuuuuuuuuuu