>>73872632>north indian weds a south indian
People more identify with their ethnic groups, like Punjabi, Bengali, Telugu, Marathi, etc. Now obviously related ethnic groups have it easier, but generally the issue is not racism between groups, its a lack of cultural similarity/understanding, like you can't speak their language/don't eat their food/etc. Each ethnicity has such unique culture in India, so people generally marry within it.
Depends on the family generally, some are more accepting, especially in cities where the ethnic-based cultural differences are less, as people move away from their traditional lands to get to cities. The kid will have more identity issues because he won't know both languages so well, etc. Nothing like black/white probably.
I'm half and half myself, both southern states, and there were definitely some issues, but you end up embracing one of the cultures heavily, and its usually alright. At least religion is ok, thats much harder.