GURU roop Sadh Sangat jeeo,
Waheguru ji ka Khalsa Waheguru ji ki Fateh.
Caste system realy needs to be eradicated from Sikhi.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/hard-talk/8550-how-many-sikhs-have-married-out.html
But no one is doing some thing for practical implication of the same and everybodyjust talks ,gives quotes from Gurbaani . Can any body from so called higher castes can marry his daugtrer/son to a boy /daughter from
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=8550
so called lower caste? If yes,it is O.K. and if no , please forgive me , we are only so called Sikhs or BHEKHI SIKHSand not real SIKHS.

Bhai Nand Lal (Singh) ji in his Rehatnama ,has mentioned at a place:-
"Amrit ko paani kahe ,Sikh ki poochhahe jaat.
Kahe GOBIND SINGH Nand Lal ji ,so sikh jampur jaat."
(Whenever we ask some sikh as to which jaat he/she belongs,we
are marching ahead towards NARAK.)

Gurbani tells us,
"JAAT PAAT NAHI POOCHHE KOI,HAR KO BHAJE SO NAR KA HOI."
AND
"NEECHAN ANDER NEECH JAAT NEECHI HOO ATT NEECH,
NAANAK TIN KE SANG SAATH,VADDEAN SIO KYA REES"
These teachings of gurbaani are more strongly supporting this aspect of
spirit told in rehatnama about JAAT.
Bhul Chuk Khima ,
WAHEGURU JI KA KHALSA WAHEGURU JI KI FATEH