I don't know too much about it actually, i know i've just read that Iran were heavily involved in buying goods from the Nazi's when other countries cut off ties.
If i go have a read now, i'm pretty certain its not like you are making out.
Edit.
hmmm
Looks very much like Iran was neutral, but decided to trade heavily with Germany because they didn't have the historic imperial aspirations of Britain and Russia (both having occupied Iranian soil after WW1 and helped install the then Shah in power). They didn't support Germanys superiority aim however, and helped a lot of Jews.
Interesting ly too
Reza Shah declared Iran neutral at the start of World War II. He feared both Soviet and British ambitions in his country and despite the benefits of economic relations with Germany, he considered Germany to be too committed to its program of race-based expansion and ideology. Neither side had Iran’s best interests in mind. In the wake of dramatic German victories against the Soviet Union in the summer of 1941, both the British and Soviet governments occupied southern and northern Iran respectively, using Reza Shah’s refusal to expel German nationals as an excuse, but in fact out of concern that a successful German drive into the Caucasus would not stop at the Iranian border and that continued Iranian neutrality would inhibit the transit of supplies from British India to Egypt and British supply routes to the Soviet Union. Allied intentions in Iran were also to protect British-controlled oil fields, to direct military supplies to the Soviet Union using the Trans-Iranian Railroad (the major railway linking Tehran with the Persian Gulf and Caspian Sea), and to put a stop to German intelligence operations in Iran.
On September 11, 1941, British Envoy Sir Reader S. Bullard met with Iran’s Prime Minister, Mohammad-Ali Furuqi, to demand the immediate removal of Reza Shah in favor of his son, Muhammad Reza Pahlavi, who was known to be pro-British. Five days later, on September 16, Reza Shah abdicated and went into exile, leaving his son as Shah. Reza Shah died in Johannesburg, South Africa, on July 26, 1944.
In January 1942, Iran, the Soviet Union, and Great Britain signed a Tripartite Treaty of Alliance. In this agreement, the Allies recognized Iranian territorial integrity, sovereignty, and political independence. They also pledged to protect the Iranian economy from the effects of the war. Most importantly, they promised to withdraw from Iranian territory within six months of the end of the war. By the spring of 1942, Iran had cut off all relations with the Axis Powers and had expelled all of their nationals residing in Iran.
https://encyclopedia.ushmm.org/content/en/article/iran-during-world-war-ii
So after help enact a second coup Iran signed a treaty that reduced the amount of trade with German.