As much as i agree, I am not convinced escalation achieves a great deal. Yes we may open the US's eyes to the comparative economic power of Europe but I doubt they are closed, more ignored as most of this has little to do with Europe beyond it being the backdrop.
Europe is very much an anti-Trump America in as much that we are willingly operating within our guidelines, within our self imposed limits and generally operate on longer term for the collective good of the block.
Any aggressive responses just fuel the grievances he imagines or at last projects to the American people or more specifically his people. Collective messaging and unity in response is Europe's kryptonite to Trump, and it is best delivered in a quiet, measured, non-provocative manner, as it gives him little room for outrage, which he requires.
As much as it would be great to call him for what he is publically, it is self harm.