The tariffs have openly been scheduled as a means to motivate trade negotiations. With Mexico and Canada the treaty awaits only congressional approval. With China the list of necessary (not merely reasonable) demands is also public. With the EU autos and agriculture need (from the US perspective) re-negotiation.
Not trusting Huawei flows from pronouncements by the Party mandating corporate obedience, combined with the reality that Chinese hacking to steal IP, actual theft on-site by CCP agents, and onward, calls for a pointed response.
As for Germany's reluctance to use EU-sourced equipment (which is available from multiple firms), perhaps it has some connection to the convenience of the One rail-Road leading from east-coast China straight to the Duisburg inland port? Volvo cars, Huawei network gear, soon-to-be Chinese-made Kuka auto manufacturing robots, all from one Amazon-like industrial source. What could go wrong? Germany's only response will be, not whether Huawei, but how much and how soon. Eriksson et al must love it. EU solidarity at work.