We are all Sikhs, no doubts. But to claim to belong to a jatha is not a crime, nor is it against Sikhi. It is wrong to say I am a "-------" Singh/Singhnee. But it is ok to say that I am Guru ka Sikh, and the sangat that I follow is "--------" . The reason there is a need for GurSikh Jathas such as akj or taksaal is that main stream Sikhi is on the decline. For example, I live in the states and if you were to go Gurdwara on sunday, there are no amritdhari singhs or for that matter many with Kesh. That is mainstream Sikhi, there no jathabandees have any effect and you can see the result. If your jatha is all amritdhari and that is a requirement, then the chance of any dilution does not exist. And if it weren't for certain jathas, who would have protected Sikhi in 84?
Waheguroo Jee Ka Khalsa!
Waheguroo Jee Kee Fateh!!