Assalamu alaikum, this is a question from a prisoner in North Carolina. I am a in prison in NC and I want to know if Muslims are allowed to let people from the Nation of Islam, Moorish science temple of America, or the nation of gods (five presenters) pray alongside of them in the five obligatory prayers.

All praise be to Allah, and may His peace and blessings be on the greatest messenger, Muhammad.
They may if they feel that this would reconcile their hearts. They do, however, need to have them pray on the sides of the rows or behind them, not in the midst of the Muslims praying. That is because their prayers are invalid until they accept Islam and perform the prayer with all of its conditions and pillars known to Muslims. Based on that, the lines will be interrupted by people who are not praying if they prayed in the midst of the Muslims.
Allah knows best.