Dont bring sikhism here.yes i can...as you said if i believe in rigveda or any hindu text,then iam hindu....but what if i find the message of some other religious text, like Guru Granth sahib ? then it means that iam a sikh..no..its all about what you believe in, which is directly related to your culture,
Its totally independent of hindusim and not even a part ofit.
Its a monotheistic religion and hinduism is polytheistic,
Dont quote guru grant here, even sikhs hate this habit of hindus merging their religion with hindusim.
And i have never seen any sikh calling his religion a culture thing . So keep sikhs out.
I've heard many, many Jews refer to themselves as this, it is actually quite common.
They are those ppl who arent taken in judaism fold, just google and read what tough criteria is to become a jew cuz of which there is a lil population of jews.