Here are my personal views:
I do not see any problems with inter-cast marriages but it’s quite obvious that family members will not agree on this. Unfortunately in India, both religions are treated opposite to each other. What I personally suggest to seek full confidence of both the families (parents). I know it’s not an easy thing to convince the parents. Also, these kinds of issues have high risk of getting attention politically, that’s why it’s really important to take the parents in full confidence.
OM SAI RAM