Many liberals have come to believe the rules of morality, decency, and good behavior don't apply to them. You see, since they're liberal they think that no matter how racist, sexist, violent, dehumanizing, evil or disgusting their behavior may be, they're still good people just by virtue of the fact that they're liberals. Of course, not every progressive feels that way, but almost no one on the Left who disagrees has the courage to speak out against the horrific behavior of his fellow liberals. That's understandable if you think about it. Just as a member of the KKK would fear being cast out of the group for speaking out against doing evil to black Americans or a Crip would have similar fears about defending a Blood, liberals are not allowed to call for human decency in dealing with those who stand in their way.
This is part of a primitive, tribal mentality that says the member of the group is right by virtue of being part of the group while others who stand in the way of the group are not just wrong, but are evil and worthy of hatred for their opposition. All the talk about compassion, tolerance and niceness on the Left is actually a mask to hide the vitriolic and hateful disposition that undergirds modern liberalism. So, while everything you're about to read applies just as much to libertarians, conservatives and moderates as it does to the Left, it's the liberals who need to hear it because they're the only mainstream ideology that habitually engages in such uncivilized behavior.
It's not okay to...
1) ....hold a protest at someone's personal residence. The only reason anyone does that is to send the fascistic message that, "We know where you live and something bad may happen to you and your family if you continue to oppose us."
2) ....put the names of gun owners in the paper to make some kind of moral point. It's even worse to do that and then, when someone returns the favor, hire armed guards to protect your house.
3) ....suspend a 7 year old from school for tossing, "an imaginary grenade into a box with what he called pretend evil forces inside."