(many were welcomed by the Arabs, helping them escape the massacres in Europe)
No, that is completely false. You must remember that the Palestinians were under the ultimate Empire the Ottoman Empire occupation for 400 years, British occupation for 30 years and Ashkenazi occupation for 75 years and therefore they were never in a position to accept or to reject any people coming in – but they did object to the it stampede by the European Jews toward Palestine after the British got there and many riots erupted starting in 1929 because the Palestinians could see what was going on – suddenly there was a huge number of white people all over Palestine and they knew they were losing their country. There were hundreds of countries where the European Jews could have gone to escape what was happening in Europe, it did not have to be tiny Palestine but they were coming there as invaders.