While I have no doubt than basically anything from China is probably backdoored (and to the fault of western countries outsourcing manufacturing for cheap labour), what exactly has Huawei done? How do we know that the Cisco equipment also isn't backdoored and if I send a few malformed TCP packets it opens up its control plane on the receiving port? Compared to the last few decades, it seems like a strong hand banning…
Huawei singlehandedly destroyed Canada's Nortel Networks through espionage and sabotage. The CIA did an analysis and discovered that Huawei was dumping wireless equipment to small wireless providers in areas around US military basis at a loss. At the very least, the ability to disrupt communication of those military bases were easily achievable.
He'll tell you a different story. When you mention the "espionage / sabotage" he doesn't laugh or shake his head, it actually just outright infuriates him. Such a naive narrative only angers him because it seems to absolve the people who managed the company of outright incompetence and corruption, which is how it should be remembered.
For example: one story I vividly recall because I could never fully fathom it involved a specific female executive who was traveling for business - first class overseas. She never made her intended engagement because she was immediately arrested upon disembarking the plane. She had got drunk and (although married) decided to perform overt sexual acts with the gentleman sitting adjacent to her. On the plane. In her seat.[1]
At some point the culture of the executive at Nortel, for whatever reason, became completely incompetent and outright immoral. Rather than Huawei underhandedly perpetrating the perfect crime, it was simply the people at the head of the organization that solicited the crime to pursue their own benefit above all else.
[1] https://www.theregister.com/2000/04/06/former_nortel_exec_fi...