If the furnace in your basement stopped working, and you hired a company to repair it, what would you do if several of the workers came upstairs, told you they couldn't figure out how to get the furnace started, and then began pointing fingers at each other and saying:
"It's his fault."
"No, it's his fault."
"If he'd listen to me, we could get this job done."
"He tries to stop me every time I'm on the verge of fixing your furnace."
You'd probably stand there slack-jawed, hardly believing what you were witnessing. Then you'd say:
"I don't want to hear you guys blaming each other. I'm paying you to do a job. Just go back down there and do it, or if you can't, get out of my house."
Or if you had a leak in your plumbing, and the plumbers emerged from under your sink to tell you:
"I'm sorry -- I can't work with this man. He undoes everything I'm trying to do to get your pipes back in shape."
"So typical of him to put the blame on me. He's got it exactly backward. I know how to stop the leak -- he has no idea. And he never has."