Guttural R
Many Jewish immigrants to Israel spoke a variety of Arabic in their countries of origin and pronounced the Hebrew rhotic as an alveolar tap , similar to Arabic '. Gradually, many of them began pronouncing their Hebrew rhotic as a voiced uvular fricative , a sound similar or (depending on the Arabic dialect) identical to Arabic '. However, in modern Sephardic and Mizrahi poetry and folk music an alveolar rhotic continues to be used.
Language of the New Testament
After the Babylonian captivity, Aramaic replaced Biblical Hebrew as the everyday language in Palestine. The two languages were as similar as two Romance languages or two Germanic languages today. Thus Biblical Hebrew, which was still used for religious purposes, was not totally unfamiliar, but still a somewhat strange norm that demanded a certain degree of training to be understood properly.