It's not so much where they were founded and where their largest user base is
Well yes, yes it is.
It is not apparent how you have arrived at this unlikely conclusion. Please enlighten me.
Anything that is manufactured in a factory under the supervision of the Chinese communist party and all its experts is, by definition, unfit for secure use - military or otherwise - in the USA or anywhere else. South Korea, although not much more secure than the US, Canada or the UK, for example, is still on "our side".