Linux is an open source OS.
Just like saying most of the physics theory are written by west and asian can't use it for other invention..
You can use it. But unless you go thru the code line by line, you cannot be sure it does not have a backdoor.
Also linux uses standard hash algorithms to store passwords. NSA is rumored to be able to break those.
Physics theory are not man made, computers are.
Have you audited your brain? Are you really that dumb?
Getting personal. Maybe I touched a nerve.