Complex sentence: In addition to producing Smulian has had a huge involvement in the Middle-Eastern crossover music scene where he worked with a variety of musicians from both the Israeli and Palestinian regions, all of which were from a vast range of different cultural and political backgrounds.
Split into simpler sentences: In addition to producing Smulian has had a huge involvement in the Middle-Eastern crossover music scene where he worked with a variety of musicians from both the Israeli and Palestinian regions. These artists were from a vast range of different cultural and political backgrounds.