well we all know king jaichand shunned his daughter for marrying prithvi against or rather betraying his wishes. part of the reason was definitely the enmity between pritvi and jaichand. But mostly to me i think its because he loved his daughter.
well loving you child is not new, but jaichand's obvious adoration for his beautiful and well educated daughter was a fascination which it seems had a turn towards obsession. He was willing to do anything for her, even defy his own political alliance and position to another king and even his elder uncle to anull a almost officially agreed marriage.it was all becuase his future son in law failed to safeguard his daughter. we all who have watched how agrresive he grew when he slapped vikram
may be all these were evnts of his possessive ness of his daughter who was more a precious and coveted ornament to him and as such when the ornanament decided to adore the person he had hated the most. it was out of madness and anger of losing your most valuable thing to the most disgusted person that jaichand condemnded sanyogita completely eventually being the main perprettrator of his death.
however all this are deduced based on my watchjing some of the episodes of prc , boath ne and old and may vary with history cause the sagars have a unique gift of moulding history with folklore to the best of their advantage.