To have an inter caste marriage is similar to inter caste blood transfusion which does not create any problem if they have a well matched blood group. He has generally a very good horoscope with an excellent house of happiness and the house of Luck, his seventh house Kalathrabhava is very deficient and whomsoever Pandit he marries, he will have the same potency for the house and may therefore not enjoy much of marital bliss. His relationship and emotional bondage with both father and mother are very strong and he will look after you people well when needed.

There is little point in worrying about things which are beyond one’s control. It is possible that the girl he is going to marry has a good matching horoscope who has an aptitude towards sacrificing her life for the sake of the husband and family. So do not overstep and think about the impossible future. Do see her horoscope and check whether they match and if so how well it matches etc. and then decide. There will be astrologers galore in your neighbourhood who try to fleece you and make money out of the bad spell you could be having on account of your son getting married to an intercaste girl. Do not pay heed to such rumourmongers and spoil your sleep.

Ask him to read my blog  and read all the articles and come for a scientific evaluation of his horoscope.