The United States has failed to provide sufficient evidence of an ongoing or imminent attack against its interests to justify the strike, the expert ruled.
This is the latest in a series of planned statues for Soleimani.
In an interview with a close friend of Soleimani who accompanied him on various visits to Iraq and Syria, Hasan Flark revealed that Bashar Assad was on the verge of giving up his reign in Syria.
How can one counter two generations of brainwashing by the Iranian government?
"The one common denominator expressed by all the experts was the importance of maintaining the strength of the US-Israel relationship."
German media reports said 100 supporters of Soleimani registered to attend the event at the Hezbollah-dominated mosque Imam Riza in the Berlin neighborhood of Neukölln.
Two airport security staff and two Cham Wings employees are suspected of having tracked Soleimani's final movements at Damascus airport.
Pompeo also claimed that attacks planned by Soleimani, who was killed in a US drone attack last week, "were going to lead, potentially, to the death of many more Americans."
The Islamists in Hamburg praised Soleimani as a "heroic martyr."
The killing puts Pakistan, which is majority Sunni Muslim but has a large Shi'ite minority and is anxious to avoid any regional upheaval, in a sensitive position.