I only heard part of it. Switched the channel when I heard him say Cheney had 5 heart attacks. Heart Attacks are not considered as something to make light of in my family.
My father-in-law and all of his brothers dropped dead of sudden heart attacks in their early 50’s. My dad survived a heart attack at age 54. It’s just not funny to us.
I agree with you; that is not cool. As counter intuitive as it may seem, in light of your post, I think Leno is a closet conservative who finds it necessary to throw his liberal audience a bone once in a while. That being said, even Leno needs to be able to put on the brakes when the line is being crossed.