Complex sentence: This amount of foreign inhabitants makes about 1.5% of Saudi Arabia's population Buddhists, or around 400,000 nominal Buddhists, most likely giving Saudi Arabia the largest Buddhist community in the Middle East or Arab World.
Split into simpler sentences: This amount of foreign inhabitants makes about 1.5% of Saudi Arabia's population Buddhists, or around 400,000 nominal Buddhists. Causing, Saudi Arabia to most likely contain the largest Buddhist community in the Middle East or Arab World.