Complex sentence: Two hundred sixty thousand Jews from Arab countries immigrated to Israel between 1948 and 1951, amounting for 56% of the total immigration to the newly founded state, and six hundred thousand Jews from Arab and Muslim countries had reached Israel by 1972.
Split into simpler sentences: Two hundred sixty thousand Jews from Arab countries immigrated to Israel between 1948 and 1951, amounting for 56% of the total immigration to the newly founded state. Six hundred thousand Jews from Arab and Muslim countries had reached Israel by 1972.