Has Islam had any affect on the caste system in pakistan?

I AM NOT ACCUSING YOU I AM SHOWING YOU THE MIRROR.
AND I AM THE ONE WHO USED ALL THE FOLLOWING HATE FILLED WORDS FOR MY BELOVED COUNTRY.
YOU COULD BLAME THE ESTABLISHMENT OF THAT TIME WHO DID ALL WHAT THEY DID AT THE TIME. WHAT COUNTRY HAD TO DO WITH IT. COUNTRY HAS BEEN HIJACKED BY IDIOTS FOR MANY MANY YEARS. YOU KNOW THAT.
YOU OWE ME AND THIS COUNTRY AN APOLOGY IF YOU DID NOT MEAN TO INSULT THE COUNTRY AND ITS CITIZENS.