Don't waste your time trying to figure it out. There are a few here that seem to think it is the "duty" of Christians to dump on those who are unbelievers and those who are believers but who do not think exactly like they think. Some take their personal theological systems to the extreme that if others do not adhere to their system, they are not Christians and should be dumped on until they leave TOL
Here are a few of the systems that are taken to extreme:
1. Mid Acts Dispensationalists (call themselves MAD) This is a form of hyper-dispensationalism. Look it up on the internet to find out what they believe. Whatever you do, DON'T start a thread on it!
An example of someone who believes this is Saul to Paul. Look up who his friends are on his profile and you will find who agrees with him. Not all of them are nasty to others, but you will figure out pretty quickly which ones are the ones to avoid.
2. Hyper- Calvinists (believe in limited atonement, that is, that God has pre-chosen who will and who will not be saved). Whatever you do, DON'T start a thread to ask about this, either. Go back and look at some old threads with this topic and you will figure it out.
Most of these people are not as vitriolic as the MAD people. Examples are: Nang, Assurance Agent (he's not hyper-Calvinist tho, just a Calvinist), and the guy who has TULIP in his avatar - can't remember his name right now..)
Jehovah's Witnesses (not Christians, but don't tell them that!
Squeaky is one example, and so is Keypurr.
Other: I have not figured out what these people believe as far as a particular theological system. They seem to have their own unique system, and some do not attend church but instead have home churches. If you start a conversation with them you will eventually get attacked. Examples are : Lighthouse, Nick M., Sozo, Elohiym (although I have to say, Elohiym is not as bad as some of them as far as name-calling is concerned), Butterfly, etc. These guys as a group seem to be the worst offenders, save Elohiym, at least, in my personal interactions with them...
In time, you will figure out who adheres to these beliefs and who makes it a habit to attack others. Avoid them and you will have a more pleasant interaction at TOL.