Re: Scepticism...
The risks are not quite that simple and multiple sourcing will only mitigate some risks, say at the base station level. When it comes to managing the network, it's a different issue. But the risk is probably still closer to the GPS one: disabling or disruption rather than mass surveillance. If you want to spy on people's communicatins it's far easier to do it if you can install something on their devices, or listening at the edge, which is what GCHQ is for.
The Huawei spat is a mainly "made for Twitter" issue that portrays Trump fighting for American's freedom and trying to gain leverage in trade talks with China. However, seeing as most of America's consumer electronics and a great deal of other stuff is made in China, it's that not that convincing.
If America is really worried about China working its way up the value chain, then it should start investing in the relevant areas. If companies spent less money on advertising and lobbying, they'd have more money for R&D.
Biting the hand that feeds IT
