Why is it irrational and unproductive to try to "prove" or "disprove" the
existence of God?

It's not worth it.

Explanation:

I'm a believer, but if people are really sure to believe that they were created by the big bang, or by a superior creature they will believe it no matter what evidence you provide. Another example of this is flat-earth believers.

It would just be a waste of time, depending on your audience of course.  

the answer is true. i hope this .

the caste system in india is the paradigmatic ethnographic example of caste. it has origins in ancient india, and was transformed by various ruling elites in medieval, early-modern, and modern india, especially the mughal empire and the british raj.it is today the basis of educational and job reservations in india.it consists of two different concepts, varna and jati, which may be regarded as different levels of analysis of this system.

the caste system as it exists today is thought to be the result of developments during the collapse of the mughal era and the british colonial regime in india. the collapse of the mughal era saw the rise of powerful men who associated themselves with kings, priests and ascetics, affirming the regal and martial form of the caste ideal, and it also reshaped many apparently casteless social groups into differentiated caste communities.the british raj furthered this development, making rigid caste organisation a central mechanism of administration

i didn’t fully understand your question but i hope this you !