Yes, WH. And it's time to stay somewhat clear as much as you can. Let him find a target (other than the kids) to take it out on.
He won't return the niceties, but it's not an excuse for you to not continue to provide them. i.e. it doesn't let you off the hook for being pleasant and nice and a responsible human, right?
You handled it beautifully and will continue to I'm sure.
AJ
"Our lives begin to end the day we become silent about things that matter" MLK Put the glass down... "Yesterday I was clever so I wanted to change the world Today I am wise, so I am changing myself."