I think that the US is also to be blamed for those fears. They increase the tensions in the middle east by being involved there. The recent death of Suleimani for example sparkled a new fire in the region.
I agree completely. US adventurism has been the cause of much global conflict since the second world war. Kinda funny how "defence" always seems to involve invading other countries.
And before the US rose to global pre-eminence, it was other Western powers. As I've said elsewhere, much of the chaos in the middle east today can be traced back to the Sykes-Picot Agreement of 1916, and the UK and France deciding how best to split the region between them. When asked about potential placement of borders by the UK Prime Minister, Sykes merely looked at the map and said "I should like to draw a line from the ‘e’ in Acre to the last ‘k’ in Kirkuk" - completely disregarding historic borders, and ancient tribes and nations and alliances. This explains why, for example, the Kurdish people nowadays are split, some in south east Turkey, some in north west Iran, some in Syria, some in Iraq...
The west has a lot to answer for.