Why do mothers uses the kids as a weapon?

I dont care what any body says. No one has a good reason to use any child against there ex ... at the end of the day if you have a problem with your ex thats your problem, Dont bring it on the child because you expect that child to respect and love you ther...efore should respect and love its other parent to. the only time a child should e...ver be stopped from seeing its parent is if there is a problem where the child my be physically in danger or if there is abuse ... dont sit there and say ooohhh you said this so you cant see your child, or sit there having a go and coming up with utter b**ls**t and threatening that the other parent wont see the child again ... its pathetic and out of order and causes hell for the child i dont care what any one says it's a piss take end off! Why are they like this?