How can Arabs and Muslims unite and work hand in hand for the sake of Allah and Islam?

The disunity, humiliation, and backwardness of Muslims are due to their turning away from religion and following the ways of the Jews and Christians. The Prophet, peace and blessings be upon him, informed us of this when he said: "When you engage in 'inah transactions, and you hold onto the tails of cattle, and you are content with cultivation, and you abandon jihad, Allah will inflict humiliation upon you, and He will not remove it until you return to your religion." They must unite and return to their religion and strive in the way of Allah. This will be aided by: knowing that disagreement leads to failure, overlooking sectarian and minor differences, fulfilling communal obligations (fard kifayah) such as seeking knowledge, engaging in da'wah (inviting to Islam), enjoining good and forbidding evil, holding conferences for Muslim unity, and caring for the youth.