Re: What do you think about a Muslim man marrying a Hindu woman?
First of all I must correct myself. As the above suggests that others paths are longer path to Salvation - that is erroneous.
Muslims believe that Islam is the ONLY Path to Salvation. All other paths lead to ruination.
Clearly you can see that there are ‘Steep hurdles’ ahead in this relationship. Once the novelty of the marriage wears off the hurdles will rear their ugly heads. Trivial disputes will lead straight into major ones.
I find the blame lies squarely on the shoulders of your potential ‘son in law’.
As a practicing Muslim he should have known better that he cannot marry a Hindu girl. And that he cannot force her to accept Islam or make her a Muslim just for convenience of marrying her. This is completely unacceptable in Islam.
Your daughter has to accept Islam as a correct and the ONLY path to Salvation of Mankind and not hold any other paths as legitimate.
I fully sympathize with the situation that you and your daughter are in.