from an economics professor who examines the evidence about what is causing the trade war between china and the west.
The main thesis is that car manufacturing (and associated manufacturing such as batteries, electronics etc) is "strategic" enough that the west doesn't want to build a dependence on china for it.
In the event of a war, china can cripple the west by cutting off the exports, and/or potentially install backdoors into the devices and shut them down to disrupt etc.
Not to mention that by allowing china to own the manufacturing, they will have built up the massive industrial capacity for which it is easy to convert to a war time factory. The west's dwindling manufacturing capacity would mean that china will out-produce and win - lessons that is learnt from WW2.