Isn't the phrase "Brood of vipers" another term for "seed of the serpent," or "Satan's off-spring", namely the children of the Devil? I see very little difference between pointing out demonic behavior and calling someone "Satan's offspring".
Jesus did not water down his condemnation for evil people. Calling people a "brood of vipers" in today's world would not be politically correct and would bring on much condemnation and outrage. But isn't that the problem today? Whenever exposing evil, the person doing the exposing is accused of not being Christlike. Why is it when evil is pointed out, those pointing it out, get targeted? I believe that the killing of the unborn and mutilating gender confused children is evil. I believe that these evils come out of the abundance of hearts filled with evil. Yet when I mentioned that Biden pushes those evils, it seems to have upset people.
As Christians we need to decide, will we cuddle evil with nice sounding politically correct words or will we point it out for what it is. I agree that we need to project our words with kindness, something I fail to do at times. But I will call "evil" for what it is.