Well, more or less yes. Hado is succumbing to your inner rage to the point that your morals and ethic codes are thrown from the window and you are willing to do anything to kill your enemy, including forsake your humanity.
Now, the basic principle behind the surge of murderous intent is simple, the angrier you get, the more your rage empowers you, but the more....unfocused you become. Simple, no? Now, you may ask how is this possible. I point to the Uchiha clan and let's move on. The only way you can actually know of Hado is by experiencing it firsthand. It can be seen similar to the Sharingan, needing conditions where there is high levels of pressure on you and you experiencing great rage due to this pressure. The easiest way would be to simply insert Hado chakra inside of you and have you try to mimic that feeling. That simply wont do. You need to feel that pressure, that desire to win, that rage of anger. You need to feel the urge to kill to live. As a result, only people who push themselves to be the best at all costs, can take full advantage of it. However, the untrained mind can be driven to a temporary insanity if they have not prepared for it.
Once a warrior has awoken the Satsui no Hadou within them, it can be very hard to resist. Learning Satsui no Hadou is the first step in learning the most fatal technique known to all of their martial arts - Shun Goku Satsu. If one has used it to their fullest extent for too long throughout years of their life, they will completely lose control, and will transform into a demonic being.
Are you willing to trade away your humanity for power?