1)Allah subhanahuwatala only accepts Islam.
The Religion before Allah is Islam (submission to His Will): Nor did the People of the Book dissent therefrom except through envy of each other(359), after knowledge had come to them. But if any deny the Signs of Allah, Allah is swift in calling to account. (3:19)
. In the sight of God there is only one system of life and way of conduct which is both in accord with reality and morally right. This consists of man’s acknowledging God as his Lord and the sole object of his worship and devotion; of surrendering himself unreservedly to God in obedience and service. In doing so he should follow in toto the guidance communicated by God through His Messengers rather than try to devise ways of serving God according to his own lights. This mode of thought and action is known as Islam, and it is only reasonable that the Lord and Creator of the universe should accept nothing less from His creatures and servants. In his folly man thinks that he has the right to believe in and follow every doctrine that comes his way whether it be atheism or idolatry. In the sight of the Sovereign of the universe, however, all such attitudes amount to nothing short of rebellion against God.
This shows that the religion of every Messenger of God, in every age and clime, was none other than Islam (submission to God). Likewise, every Divine book, in whichever language it was revealed, and to whichever people it was addressed, contained the teachings of Islam. The various religions which have spread among mankind are distortions of this true, original religion, and are the result of tampering. Coveting privileges over and above those to which they were entitled, people altered the beliefs, principles and injunctions of the true religion in a manner conducive to their own interests.
Miserable is the price for which they have sold their souls, in that they deny (the revelation) which Allah has sent down, in insolent envy that Allah of His Grace should send it to any of His servants He pleases(95): Thus have they drawn on themselves Wrath upon Wrath. And humiliating is the punishment of those who reject Faith. (2:90)
Racial arrogance made the Jews adverse to the reception of Truth when it came through a servant of Allah, not of their own race. Again the lesson is wider. Is that adverseness unknown in our own times, and among other races? Yet how can a race or a people set bounds to Allah’s choice? Allah is the Creator and Cherisher of all races and all worlds. (Cf. n.359)
Another possible rendering of the same verse is: ‘And how evil is that for the sake of which they have sold themselves’, i.e. for the sake of which they have sacrificed their ultimate happiness and salvation.
. They had longed for the promised Prophet to arise from among their own people. But when he arose among a different people, a people they despised, they decided to reject him. It was as if they thought God was duty-bound to consult them in appointing Prophets, and since in this case He had failed to do so they felt they had a right to be offended by God’s ‘arbitrariness’.
Mankind was one single nation, and Allah sent Messengers with glad tidings and warnings; and with them He sent the Book in truth, to judge between people in matters wherein they differed; but the People of the Book, after the clear Signs came to them, did not differ among themselves, except through selfish contumacy. Allah by His Grace Guided the believers to the Truth, concerning that wherein they differed. For Allah guided whom He will to a path that is straight.