Western fear of China
Basically, the fear western countries have of Huawei is:
>We have realised that it would be easy for China to conduct spying using the same methods the US has for the last 50 years+ if a Chinese manufacturer is given the same level of access to infrastructure that the US has traditionally enjoyed.
No proof beyond, "well we've been spying using this method for ages, so they probably could too"
social.device5.co.uk is one server in the network