Barbara is right on the money. Izzy may come around in her own time. She may not. It's HER call. If the behavior gets worse, then I'm sorry, I'd question your husband. Cats do NOT hate people unless they've been abused or tormented (even jokingly).

I admire your persistence. But if your husband is unwilling to make some changes, things will only stay the same or get worse.

If all else fails, rehome Izzy so she can get some peace. JMO.