Mine is got to be Treat people like human being. Like what is that supposed to be? If it's about respect then I don't know who you are or what you do, why should I be respectful to you.
I treated people the way they deserved to be treated. If you are a senior or a veteran then I will treat you with respect, if you are a moron then I will treat you like a moron and frankly I treat everybody like a moron until proven otherwise.
Imagine being so worthless in life that simply being exist alone is some virtue, but that can be said about most leftist.
Leftists are some of the worst misanthropes in the world. They are the greatest proponents of abortion, of impairing fertility and reproduction to reduce "overpopulation", of making everyone eat bugs, and of encouraging everyone to move to the cities to live in dirty, cramped conditions. If you ever hear another leftist telling you to "treat people like human beings" again, then just reply: "human beings are the worst people on Earth", and they will have no response for you.
The worst catchphrase for me would probably be "conspiracy theory". A sentence that makes everyone afraid of vocalizing how certain people push policies that benefit themselves against your interests, lest their peers think them mad. A term designed to keep people from ever looking up at what other people are doing, making them afraid of ever questioning it.