1) because you believe in correcting past injustice wheater you are from "upper cast" or "lower cast" or "obc"or non hindus .Can you please tell us why or constitution which is written by Ambedkar supports and gives rights & extra pervileges for minorities .When very these minorities ruled majority with iron hand destroyed our temples,universities,killed and burned hindus alive for not converting,made us slaves and deoported so many of them to central asia where most of them lost lives in hindu kush area or were sold in slavery. If you know anything about Roma people formaly called as gypsis you will cry your heart for them.
2)If past grevence is not and issue with you'll but the present one.Then why you same people oppose removing creamy layer from getting benefit.
If their is any third category let me know if not please justify your stand.