As German defense minister said “Iran is on our doorstep so…” meaning that they are afraid because europe is weak. and so they will cave. Meanwhile Trump is trying to force Europeans to redirect their capital to the military which would neutralize their trade advantage with the USA. These things are quite simple as a business person, incomprehensible as a moralist, and inconceivable as an ideologist/theologist.

Cliffsnotes Version:
by Steven Kolpek
– USA interventionism allowed allies to reduce their military spending
– allies with reduced military spending were able to use funds to leverage trade over US
– US begins to pull out from important areas in middle east
– allies forced to spend more in military
– ally trade leverage reduced due to forced redirection of funds