Quran is for all Mankind from the God of Abraham, Noah, Moses, Jesus and Muhammad Peace be upon them.
Kaaba is a mosque, muslims don't worship kaaba they only worship One God.
What Is Islam?
The religion of Islam is the acceptance of and obedience to the teachings of God which He revealed to His last prophet, Muhammad .
Belief in God:
Muslims believe in one, unique, incomparable God, Who has no son nor partner, and that none has the right to be worshipped but Him alone. He is the true God, and every other deity is false. He has the most magnificent names and sublime perfect attributes. No one shares His divinity, nor His attributes. In the Quran, God describes Himself:
Say, “He is God, the One. God, to Whom the creatures turn for their needs. He begets not, nor was He begotten, and there is none like Him.” (Quran, 112:1-4)
No one has the right to be invoked, supplicated, prayed to, or shown any act of worship, but God alone.
Belief in the Prophets and Messengers of God:
Muslims believe in the prophets and messengers of God, starting with Adam, including Noah, Abraham, Ishmael, Isaac, Jacob, Moses, and Jesus (peace be upon them). But God’s final message to man, a reconfirmation of the eternal message, was revealed to the Prophet Muhammad . Muslims believe that Muhammad is the last prophet sent by God, as God has said:
Muhammad is not the father of any one of your men, but he is the Messenger of God and the last of the prophets... (Quran, 33:40)
Muslims believe that all the prophets and messengers were created human beings who had none of the divine qualities of God.
Belief in the Day of Judgment:
Muslims believe in the Day of Judgment (the Day of Resurrection) when all people will be resurrected for God’s judgment according to their beliefs and deeds.
What Is the Quran About?
The Quran, the last revealed word of God, is the primary source of every Muslim’s faith and practice. It deals with all the subjects which concern human beings: wisdom, doctrine, worship, transactions, law, etc., but its basic theme is the relationship between God and His creatures. At the same time, it provides guidelines and detailed teachings for a just society, proper human conduct, and an equitable economic system.
Note that the Quran was revealed to Muhammad in Arabic only. So, any Quranic translation, either in English or any other language, is neither a Quran, nor a version of the Quran, but rather it is only a translation of the meaning of the Quran. The Quran exists only in the Arabic in which it was revealed.
