He made the remarks in a written statement issued on Sunday (August 30).
Referring to the United States and Israel, Mojtaba Khamenei said efforts are being made to fuel divisions among the people of Iran and other Muslim countries by exploiting ethnic, cultural, social, economic, political and geographical differences.
According to him, the greater the division among Muslims, the weaker the Islamic Ummah will become. He said enemies are seeking opportunities to expand their influence by taking advantage of such circumstances. He therefore urged Muslims to refrain from any activities that could deepen divisions within the community.
Addressing the situation in Palestine, Khamenei asked whether the people of Palestine would have been left so helpless if the Muslim world had remained united. He also questioned whether they would have had to suffer oppression and crimes at the hands of the occupiers.
Speaking about the Persian Gulf countries, he said that if these states had stood united under the banner of Islam, no power from a distant land would have dared to cast covetous eyes on their territory and resources.
In the statement, Mojtaba Khamenei identified the US government and Israel as the main opponents of unity and mutual cooperation in the Muslim world.
He said their opposition is not limited to Iran, the Iranian people or the Islamic resistance. He claimed that they also maintain a hostile stance toward the broader Muslim Ummah, including countries across West Asia and North Africa.