Izzy is only getting a pass from people because she has a vagina pure and simple. The same people that will say Nick Bates should be locked away for life are the same people who think's Bella can be "redeemed". At least Bates abused Anna to get his nut off, Izzy here would probably murder a pet store animal with any child in her care so she could use it as blackmail to make them her "slave" and eat shit with her as she rapes them.
It really doesn't get more evil than this. We should be so fortunate that Izzy hasn't had access to children on a regular basis like Nick did.