Inter sex people do deserve the right to marry whomever they'd like. They are people who make choices, just like you and me. There is no reason to take away something that is their right to do just because you do not agree with a choice that they have made.
Life partners, whether same sex or heterosexual, deserve the right to reap the benefits of their commitment to each other. When two people enter into a relationship in which they share expenses and are pursuing a common goal, they are demonstrating that their dedication to each other is very deep and that they want to share a life together.
No matter what gender a person may be, or what gender they might present as, they deserve the right to marry. Whether it's a man and a woman, two women, or two men, love is love and their commitment to each other should be able to result in a binding union.
Everyone has the right to marry whoever they want as long as they not an immediate blood relative or below the age of consent (or for some reason is incapable of consent). If somebody is intersex, an extremely rare genetic condition, then this applies as much as it does for anybody else.
Yes, I think intersex people deserve the right to marry whomever they'd like because it would be wrong to deny them. It would be wrong to tell them not to marry someone because of silly reasons. You can't help how you're born and you can't help who you fall in love with. Life is short. Marry who you want. Intersex or not.