Pretty much anything attributed to Islam that is useful or beautiful they stole from others. In the case of algebra, astronomy, zero, “arabic” numberals, medicine, architecture, horse breeding (don’t know about camels) and archery, and much more, were all very advanced in India many, many centuries before.
I dunno about the horses. Arabian horses didn’t come from india. Arabians are a totally unique animal. they have a different number of ribs and vertebra than all the other horse breeds have.
I did know about arabic numerals. However, the indians quit using those numerals centuries before the arabs started using them. That’s why arabs get credit. That’s how an old indian friend of mine explained it.