"Well I said you may or may not agree with his goal. †the point is, unlike the rest of us who just complain on message boards, he took action for what he believed in, meaning his life has more meaning that all those who just stay quiet and do nothing."
Does a person who acts on their beliefs inherently have more meaning to their life than a person who does not do so? A proud capitalist-oriented man who believes only in the value of the dollar will act on that belief to destroy a forest. Does his life have more meaning than someone who is not so destructive (whatever precisely meaning means)? If for a life to have meaning, it means something like "made an impact on reality", then all the selfish destructive acts are just as meaningful as valuable constructive ones. Perhaps this is what you mean by meaning, but if that is the case, it is a poor criteria to judge the value of an action, for it inherently ignores the value of an action, and I think we need to decide what is valuable and not ignore it. Meaning in the sense of impact alone is not going to be enough.
"What's interesting is that once you realize that there are no laws outside man's laws, you realize that there is no need to justify one's own beliefs. †They are your beliefs because you believe in them. †His action is what justifies it, for his action is what set it in stone."
So you're saying my beliefs do not need to be justified in some abstract way because there are no laws that govern what beliefs I will or wont have. I can hold whatever beliefs I want. You emphasize that you mean something like this when you emphasize that the beliefs are possessed, "they are your beliefs because you believe in them". You then seem to believe that a belief is justified if it can be put into action. So a justified belief is one that has been put into action.
This seems to be a path to ignoring reality. Think about beliefs about what action should be taken. If I believe the way to put out a fire is to throw gasoline on it, that belief will be justified as true or corresponding to reality or however you want to talk about it based on the fact that I throw gasoline on the fire. It seems very strange to say this, that that belief was justified because I acted on it. It seems like my belief would be justified if I had a reason for holding it, if it was verified somehow. The contents of what I believed turn out to be false, afterall. The gasoline just makes the fire worse.
So it's true that we can believe whatever we want (in some free or unfree sense of want), and that they are -our- beliefs because we are the ones believing them, but the jump to the belief itself being justified (which is inherently going to have something to do with getting onto reality or truth or something like that) because it was followed through seems a bit crazy. Not all beliefs are equal. Not all beliefs are equally justified, that is, not all beliefs get onto reality equally.
"I don't see anything wrong with what he did. †He didn't know any better to do anything with more results and he wasn't going to sit around and wait to think of something."
I live in the forest and there are wolves about. I need to build a fence to keep them out. There are many sensible paths to building a fence. Unfortunately, I don't know what they are. In fact, I'm entirely ignorant of the fence option. I only know that I hate (and fear) the wolves and the consequences they bring about, so I attack them and am promptly devoured afterward. I wasn't going to sit around and wait to think of something. I wasn't patient enough to think the situation through.
Ignorance and impatient lazy thinking does not make my poor choice of action any less poor, even if I was somehow destined or determined to make that poor choice.
"Maybe we all should have shot up our schools. †Maybe the mass killing would have opened some eyes. †Maybe not though. †I guess we'll all get old now. "
This is only sensible based on your erroneous assumption about the equality of how close to reality all beliefs get.
The answer to inaction is not action for its own sake, action at any price. Action alone should not be so dogmatically pursued.