Best time to see muslims talk about castes is around marriage. It's all about Indian customs and traditions then. Dowry becomes acceptable, "ladki ka haq hai".
You'll see the most 'practicing' and 'pious' muslims putting businessmen to shame with their negotiation skills.
(1/2) https://twitter.com/Iqra_K_/status/1250522555997319168

"Paisewale hain to kya hua? Hum to khandani blah blah hain.
Our parents give up on many of their comforts just to make some ungrateful a$$hole rich, all the while not knowing that their daughters will never respect or be respected.

Caste for Islamic values!!!
Btw, the word practicing was in quotes.
Don't know why you have to defend something that I saw happening? Were you there too?