I honestly don't get the Kate hate. For starters, she's not the reason why people died. That was Martin, Tanaka's security. Had he not did what he did, everyone could of been alive, with the money AND with Kate finding Geeta.
If you want to hate anyone hate Geeta for abandoning her KIDS. I mean how desperate was she to abandon her own children? Kate, knowing how it felt to feel abandoned as a CHILD because her own FATHER abandoned her when she was a child. She didn't want that fate on those kids, which was the reason for her motivation to tag along. You cannot fault Kate for that. Ward COULD'VE say "fukk her" again and dipped on that chopper, but he didn't want to make the same mistake. Kate already made her mind up that she was going to go with them or alone knowing she'll likely die.