The thing is, the west has chosen the "Christian, white identity" for its "us vs them" political discourse.
Yes, their democracy does strive to push multiculturalism today (it didn't in the past), but politically this identity is important as only that spans borders and allows them to forge strong political ties. They need to because older civilizations like in Asia and the middle-east out number them. Apart from this, it's basic politics that you have to seem superior than others to wield power. Thus, imperialism spread the idea that the white christian was put on earth to educate the rest and even rule over them. That is why white colonies - like the US, Canada, Australia etc. had more freedom and rights than the occupied colonies like India, China, middle east, Africa etc whose citizen where heavily discriminated against by the conquerors.
In today's modern world, this superiority is showcased through technical advancement, peace and prosperity - thus, US and UK made a concerted effort to ensure that conflicts among European countries ended or became minor irritants, and they appeared united. Thus the US, Canada, Europe, Australia all together project a united front through a strong economic and military alliance. And they also make sure that their close allies (that allow a military base) also flourish economically - that is one of the reason why Israel, Korea and Japan have a thriving economy (but a not so independent military).
To reinforce this perception they also cause conflict among the weaker nations. The old British policy of divide and rule continues to strive as historical grievances between countries are used to keep them fighting each other - thus today conflicts continue in South America, Africa, Asia and Eurasia. And they are fueled by the west taking sides as they please.
Another major reason for creating conflicts is to ensure that their military continues to have fighting experience - thus they are also regularly send to these conflict zones. (Afghanistan, Iraq and now Syria being current examples. While it was Vietnam and Korea in the past).
The biggest fear of the west is an Asia without conflict - If India and China and Japan resolve their differences, and work together, the age of the west as we know it will be over. Hence their desperate attempt to manipulate and push China into more and more conflict with India, Japan and Korea. And try to get these countries to agree to a military alliance with the west (the quad alliance - US, India, Japan and Australia ... India is the only holdout here).