Absolutely Not. A lot of Indians from India itself. Lots. And they seem to have no problems at all. At some nightlife it could be the case but it could be a lot with the dress code too. In Krabi the majority of the tourists I saw was from India. Lots of new Indian restaurants and ì can tell you for a fact they have a lot of Hindu speaking staff in the areas on Krabi especially where the Indian tourists visit. Go to MBK and lots of Hindu speaking staff too. Lots. So he would have no problems at all.