Grouping terms like "the west" can be broad enough to include over half of all living humans or so narrow that it applies to a small village.
It is, admittedly, not a particularly useful term, but it's not like americans are reaponsible for it.
> Where have you seen it used outside of Americans
Well, there was this minor thing called "the western roman empire" for a few years, so that might be a starting point.
I am fascinated to learn how a claim that westerners "prefer liberty over security" is somehow erasing your culture though.