(Note: not all people who have anger management issues, or a superiority complex, or a combination of both, are conspiracy theorists, nor do all people that believe in conspiracy theories are people with anger management issues, or superiority complexes. This is just from my observations of the way conspiracy theorists act, especially towards people whom don't believe in their conspiracy theories.)
From my observations of conspiracy theorists, many of them seem to have two common factors:
First, is that they seem to be very, very sure of their theories,
And second, they become very, very angry when you tell them you don't believe, and sometimes even become irate when you present evidence that contradicts their beliefs.
It just seems to me that many conspiracy theorists have this combination of both being easy to piss off, and being very self righteous, and that those who disagree with them are always wrong, and/or less intelligent then they are.
For people whom have anger management issues, when things don't go their way, they will easily and quickly become hostile, and often times either not to accept responsibly for their own actions, or has misguided blame, and blames others for something that isn't that person's fault.
For people with a superiority complex, they often times have a negative view of those around them, and are either not concerned with the opinions of others, and believes that unless you share their own opinions, or beliefs, then your opinions and beliefs (or facts) are inferior, and irrelevant. They may also deep down inside actually feel inferior, and feel they have to assert their believed superiority over others.
Many conspiracy theorists I have come across appear to contain these traits. I have observed that they tend to go into long rants, in which they blame certain people (usually the rich and politicians) for all the bad things in the world (including imaginary bad things) and in their lives. When they're confronted by a person whom doesn't believe them, and even gives them actual facts that disprove their theories, they will continue to basically say the same thing over and over again, and often in a more hostile fashion, and either claim that the facts presented to them by a skeptic are either irrelevant, fake, or ignore the facts completely.
Some conspiracy theorists will make semi-threatening statements as well. They will tell the person they are arguing with that they are either a sheep, or that they are an actual dis-information agent, and that soon that "their time will come." This is basically a conspiracy theorist's way of telling a skeptic that at some point in time that they are going to end up being killed in some kind of revolution that they believe is coming, and is also a way to try to intimidate people into believing that, what in their minds is the truth, or silence them, because it just angers them to the point of rage that people don't believe them.
On their own, having anger problems, or having a self inflated ego, is not good.
Combining the two just might led a person to believe all sorts of crazy stuff.