Islam, Christianity (non-mainstream), and Judaism worship a creator.
They don't worship the same god because each religion's god characteristics that define god are different.
They are all abrahamic religions but the fact that each are different tells me that even though they all believe in a creator, their perspective of the creator are so different how can one say a Christian worships the Muslim Allah when Allah in Islam belief has X regulations and practices (say pray five times) when the god of Christianity doesn't have that. Jews don't recognize Christ yet the Christian god says he sent Christ to save the gentiles.
They don't. They all worship a creator, though.
They worship the SAME Creator, God, Allah or Elohim.
Al ilah is the God or God.
Ilah comes from the Semitic El, Eloha, and it's myriad variants and is the Arabic form.
Different religions yes, different God, no.
Jesus PBUH has the same God as Mohammed PBUH.
The only difference is Jesus is the Son of God in Christianity and nothing in Judaism.
Those minor differences don't change God or mean we have different God's.
That is a fact, not opinion. Anyone can think whatever they want, but it can easily be proven false if you think they are different God's.
And they don't have different characteristics either, many Torah stories are discussed in the Qur'an and it is the God of Moses, not a different God, the God of Abraham PBUT.
That doesn't make sense at all. How could the God of Abraham have three different personalities in three different religions and still be the God of Abraham?
Which is an undisputable fact that Abraham had the same God as all three religions have today.