What is the ruling on belonging to an organization that is not religiously trustworthy in order to serve Islam?

A Muslim cooperates with his brethren to establish the religion and spread Islam, and this is considered cooperation in righteousness and piety. It is not permissible to join secular, communist, or Masonic parties, or any suspicious parties, because they fight Islam and work for the benefit of global Jewry or Crusaders, and this is considered cooperation in sin and aggression. However, it is permissible to join such parties in a non-Muslim country out of necessity to repel injustice. As for joining them with the intention of serving Islam, it is not permissible except with the permission of the Imam or his representative, due to the dangers involved, just as the Prophet, peace and blessings be upon him, entrusted some of his companions with tasks among the disbelievers. In summary: It is not permissible to join suspicious parties except out of necessity or by delegation from the Imam of the Muslims.