We have many threads in which caste is discussed. Search under the words "girlfriend" "parents" "engage" "boyfriend" "marry" "advice" using our search tool in the upper left corner. Make sure you set the menu for the second option, "search in every post."Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/love-and-marriage/33702-question-on-sikh-marriage.htmlReference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=33702
The topic has been discussed extensively, and Randip Singh ji has often spoken on this issue.