I am sorry for your bad experience, it must be very hurtful. I cannot fathom the mind of a person who would write this. The paradox is that no doubt she can be kind and loving toward those within her faith .
I do not think that all JWs would do this. I have known some who still managed to do little kindnesses to their d/f ones.
Oh well,if that is how it is then so be it. You are right to keep your daughter away from that sort of attitude.