Complex sentence: Traditionally, the leadership of Al-Mahra have never had a good relationship with the central government of Yemen whom they see as occupiers, and the ongoing lawlessness and terrorism issues in the other areas of Yemen have further strained the relations between the two.
Split into simpler sentences: Traditionally, the leadership of Al-Mahra has never had a good relationship with the central government of Yemen which they see as occupiers. The ongoing lawlessness and terrorism issues in other areas of Yemen have further strained relations between the two.