Not really true. The concept of God evolved over time. It started with nature worshipping transformed to Polytheism and branched into monotheism. If anyone were attributing partners to Allah, they were only doing something their ancestors did. To claim Monotheism is the only way is arrogance based on faith not logic. As for Hinduism, you are both right and wrong. There is monotheistic philosophy but Hinduism also encompasses polytheism, pantheism, monoism and Atheism. It does not regard one philosophy superior to the other claim it is the right one. It is upto the individual to seek and discover like a verse from the Rigveda says: Who really knows?
Who will here proclaim it?
Whence was it produced? Whence is this creation?
The gods came afterwards, with the creation of this universe.
Who then knows whence it has arisen? (Sorry for the caps, can’t see to get rid of it )