Yes, technically all three Abrahamic religions worship the same God. Anyone who says otherwised is misinformed and or ignorant.
Have you read the Old Testament?
Then who are the other gods, mentioned in the old testament that they were worshipping?, did they suddenly accept Yahweh as the Almighty God?
There is one Yahweh and if you do not accept his son Yeshua, then you do not accept Yahweh our loving Almighty God.
You are the misinformed one, because you have accepted mans idea as true, and not checked if it matches the Bible............
Of course originally we all are related, but our ancestors went their own ways long ago....
Because that they have forsaken me, and have bowed down to Ashtoreth the Elohim of the Sidonians, to Chemosh the Elohim of the Moabites, and Milcom the Elohim of the sons of Ammon, and they have not walked in my ways, to do that which is right in my eyes, and to keep my statutes and my judgments, as did David his father. (1Ki 11:33, my translation)
Now here Yahweh warns us of these other gods.....
Yahweh is Almighty and he is the one true God, that wanted only that we love and obey him, and only him.
The corrupted seed in us left the dark spirits able to lead people away from Yahweh the Almighty GOD.
If anyone argues with you that their god is the true god, you have many examples of our Almighty GOD Yahweh putting all the others in their place time after time.
The only time the Chosen people would lose or fail is when they went off worshiping, and not following Yahweh with all their heart and soul.
Yahweh is the Most high GOD and always was, these other dark spirits are able to lead people away that do not love Yahweh with all their heart and soul.
If you love Almighty Yahweh with all your heart and soul, then none can come against you.
The same message is told throughout the Bible, yet so many go astray....
Islam is continuing in the bloody battle that once was how things were done.
We now have an example of Yeshua our Saviour to follow.. He did not come with a sword and kill the people not following Yahweh the Most loving.
No he came to give all a warning and final chance to be Saved through his death.
So the time since Yeshua our saviour coming, to the time he returns to end it all.
Is our chance to be saved from eternal hell, and have eternal life.
The people who do not accept Yahweh's son Yeshua as Saviour, are continuing the old ways, and will until the end.
The Harvest is the time when a stop to all this will come, but we have all had enough times to repent and accept Salvation.
Religion is the problem, and always was.
The problem was people being tempted by the dark spirits, instead of following Yahweh the Almighty GOD.
The corrupted seed was played on by the dark spirits, greed pride etc, everything we are warned of, many do not take heed and hence where we are in time today.
The deception is at it's peak, and the dark side is posing as the Good side.
Beware of false prophets, which come to you in sheep’s clothing, but inwardly they are ravening wolves. (Matthew 7:15 KJV)
I urge you all to read the Bible front to back, and see how all things came to pass, and what is yet to pass...
I know the deception is hard to overcome it, but it is the only thing we were meant to do.