Some aren't. Some are. They know how to get a person to do just what they want, and they know it. Before the person even understands what's going on, they have been accused of saying and doing things they had no idea of. And I wish you luck if a particularly manipulative ENFJ decides that you are the "enemy." Such a title is usually bestowed by snubbing the ENFJ, knowingly or unknowingly. When you have become the "enemy," they will turn all of your friends against you, and even some of your family if need be. They will blame you of doing all the evil things they are guilty of, plus more.
Unfortunately the manipulative ENFJs make it hard for the other ENFJs because people notice a pattern and begin to believe they are all that way.
I did that on accident once.
ENFJ's have to be especially careful what signals they send out. I've always been respected in whatever social circles I've been in. When I give an opinion on something, people listen.
I was thirteen or fourteen and my best friend since first grade was being insufferable at a large get-together at my house. Instead of getting angry or talking to him about it like I now would, I didn't want to deal with him at the time and just threw him out of my house.
I meant to get rid of him and deal with his antics later. However, it came across to everyone there as, "I'm no longer vouching for you. I'm done and I wash my hands of you. Now get out of my house and don't come back."
I didn't realize at the time that people were willing to lose him as a friend to keep me as one. I didn't realize that throwing him out of my house would force people to choose between us. (That was really wordy, but I don't know how else to put it.)
Overnight he went from my right hand man to exiled as literally
everyone took my side. Teenagers are cannibals. He was pretty much eaten alive the rest of that summer. It was surreal seeing the reasons and lengths people took trying to "ingratiate" themselves with me.
Long story short, I cooled off and we later reconciled.
I now only use my powers for good, I promise!
Edit- To address the topic, I don't consider myself manipulative. Even in the above story, I wasn't the conniving or mercurial in any sense. I had been crossed and got mad. Sure, in retrospect I handled it poorly and took it too far but, I was young and stupid and I haven't done anything similar ever since. I learned my lesson and now avoid ultimatums all together.