I still remember how we, or at least I, thought more than ten years ago that Europe will finally have to get out from behind the US' skirts because the relationship was getting so poisonous. Freedom Fries and all. Came to nothing in the end.
Ditching the Iran deal seems very much in line with prior policy. Bush also needlessly agonized Iran after they helped him out with the Taliban. Hero of the Resistence™ David Frum wrote them a nice thank you note. And the sanctions were always inimical to European economic interests.
The trade war is certainly a lot more blatant than in the old days.