Bloomberg's reporting on such issues is notorious. Just recall their report about SuperMicro. In the article you link above, Bloomberg calls a bug a "backdoor." Vodafone disputed Bloomberg's story, because there's a big difference between an unintentional vulnerability and an intentional backdoor.
> So, it's OK to do it then? The U.S. should pretend they don't exist?
The US should provide evidence for whatever claims it makes about Huawei. All there is, at the moment, is evidence-free innuendo. You don't use the power of the state to destroy a major company on the basis of pure speculation.
I actually mixed this up with another claim of a backdoor (the bug).
The Bloomberg claim of a backdoor, which you linked, is even more absurd. The "backdoor" was Telnet, which Huawei used during the initial configuration of the Vodafone equipment. Vodafone said to Bloomberg, "There is absolutely no truth in the suggestion that Huawei conceals backdoors in its equipment."
https://www.bloomberg.com/news/articles/2019-04-30/vodafone-...
In that sense, Huawei is no different from an American company. It's simply a different government applying the pressure.
So, it's OK to do it then? The U.S. should pretend they don't exist?