As German myself, I can`t but agree that the tariffs should be equalized between the USA and the EU. It is one thing to say the tarriffs were agreed on together with a more complex set of agreements, but I understand why American workers feel pissed off by them. USA and EU are economic zones of equal quality(ignoring the europeans slept through the newest technical revolution of Amazon, Google, Apple, etc.), so there should be little tariffs needed between them.
Please let Trump turn to agriculture aids next, so the EU slashes them for sectors which have more potential.