If you lived in western Europe during the Cold War and you had any sense at all, you knew what awaited you if the USSR successfully invaded your country: a drastically lower standard of living and a police state. As a result, the NATO allies could be relied upon to back America in the Cold War, notwithstanding the occasional row about, say, Vietnam, Suez, or missiles in Germany.
China presents a completely different kind of issue. The Chinese are not a looming military threat to the Europeans, and they don’t aspire to force EU residents into collective farms. The Chinese objectives are far more limited: to prevent any criticism of their regime; and to turn Europe into what amounts to an economic colony by fostering dependence on Chinese markets and products.
The bottom line is that European support for American diplomatic and trade initiatives directed at China cannot be taken for granted. Rebuilding our relationships with the Europeans will take some hard work. Scrapping tariffs would be a good start.