Jat marry non jat this means nothing if you are sikh. If u r a sikh u r not jat nor non jatt u r just a sikh. Saying jat etc is sin itself.
it does mean nothing if you are a true sikh , but how many people are.
There are so many who dont want to acknowledge , Amrit , rehat etc, but still call themselves sikhs, then you have people who call themselves ravidassis etc. until everyone does not follow the teachings of Guru Gobind singh ji and take amrit keep rehat and accept SGGS JI as there only Guru then caste will be a issue