Basically the US government's position is that it is OK for MS, Google, Amazon, Facebook etc. to collect and store your data but that if Huawei does it it is a threat to national security. Of course this has nothing to do with the US - China trade war.
Given that it has forced Huawei to move to alternative suppliers and develop their own systems has not been viewed in a good light by the US campanies who have, and will, loose substantial amounts of business because of the bans.
Huawei has overhauled Apple and is now close behind Samsung, the world leader in smart phones. It also seems to me that Huawei is the leader in 4G technology at the moment. With all the scrutiny that they will come under following US accusations they will have to be very clever indeed to present any security threat because of installation of their equipment.