Fa-innahum AAaduwwun lee illa rabba alAAalameen (surah Shuara: 77)

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(26:77) They are all enemies to me, *55 except One Lord of the worlds, *56

Fa innahum `aduwwwul leee illaa Rabbal `aalameen

*55) That is "When I consider them, I see that if I worship them, I shall ruin myself both in this world and in the Hereafter. As their worship is clearly harmful, worshipping them is worshipping one's enemy." These words of Prophet Abraham bear a close connection with verses 81, 82 of Surah Maryam, which say: "These people have set up other gods than Allah so that they may become their supporters. But they will have no supporter; all of them will not only disown their worship but also become their opponents (on the Day of Judgment)."
It should be noted that Prophet Abraham did not say, "They are enemies to you", but said, "They are enemies to me." In the first case, there was every chance that the people would have felt offended and provoked, because it would have been difficult for them to understand how their own gods could be their enemies. As a matter of fact, Prophet Abraham appealed to the natural feeling of man that he is his own well-wisher and cannot wish ill of himself deliberately. This would inevitably have led the addressees to think whether what they were doing was really for their good and was in no way harmful."
*56) That is, "Of all the deities who are being worshipped in the world, there is only One Allah alone, Lord of the universe, in whose worship I find any good for myself, and Whose worship is the worship of one's own Cherisher and Supporter, and not of one's enemy." Then Prophet Abraham briefly gives the arguments, which nobody could refute, as to why Allah alone is worthy of man's worship and indirectly suggests that his addressees (the idol-worshippers) had no rational basis for worshipping deities other than Allah except in blind imitation of their forefathers.