I'm playing CK2 2.0.4. I know it's old version, but I strongly dislike all this India stuff. During my Khazar campaign, I tried to disqualify my second son from gavelkind inheritance by giving him temple and making a rabbi. This was to no avail - he is still listed as a heir.
I fully expected to find something on the topic, but internet seems quiet about this. Is such behaviour confirmed or I am doing something wrong?