The extreme view that Allah is some other god than the God of Abraham is simply a ridiculous notion. People who propogate this view have concocted a lie that Allah is anything other than the Arabic way to speak of the one monotheistic God of the children of Isreal (as the Quran claims).
The Arabic term “Allah” is a combination of two words, “AL” and “ILAH”.
“Al” is the definite article in Arabic. semitic linguists believe that the original root definite article of all semitic languages was “Hal.” with Hebrew it evolved as “Ha” and Arabic as “Al”.
“ILAH” means divinity or “god” but “ILAH” is not definite. It can be made feminine or it can be made plural and thus does not always convey the absoluteness of THE ONE God, So accordingly, when speaking of THE ONE God of monotheism, the Qur’an says “AL-ILAH” which is conjugated into “ALLAH”.
Being the God of just Abraham is not enough to say you know God. You must woroship the God of Abraham, Isaac, and Jacob.
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Ex
5 Then He said, “Do not draw near this place. Take your sandals off your feet, for the place where you stand is holy ground.” 6 Moreover He said, “I am the God of your father—the God of Abraham, the God of Isaac, and the God of Jacob.” And Moses hid his face, for he was afraid to look upon God.
Romans 9
6 But it is not that the word of God has taken no effect. For they are not all Israel who are of Israel, 7 nor are they all children because they are the seed of Abraham; but, “In Isaac your seed shall be called.”8 That is, those who are the children of the flesh, these are not the children of God; but the children of the promise are counted as the seed. 9 For this is the word of promise: “At this time I will come and Sarah shall have a son.”
10 And not only this, but when Rebecca also had conceived by one man, even by our father Isaac 11 (for the children not yet being born, nor having done any good or evil, that the purpose of God according to election might stand, not of works but of Him who calls), 12 it was said to her, “The older shall serve the younger.” 13 As it is written, “Jacob I have loved, but Esau I have hated.”
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Worshiping the God of Abraham alone is of no value. But more so then Abraham, Isaac, and Jacob. Without the Son, you do not have the Father.
If you do not know Jesus (not the Islamic fake Jesus, but the Son of God).
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John 14:6
6 Jesus said to him, “I am the way, the truth, and the life. No one comes to the Father except through Me.
22 Who is a liar but he who denies that Jesus is the Christ? He is antichrist who denies the Father and the Son. 23 Whoever denies the Son does not have the Father either; he who acknowledges the Son has the Father also.
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It is not an extremem view, the allah worshiped by muslims is no god at all.