While I see your point that they are all criminals, let me present it from a different perspective.

Why do they come here illegally? Probably because it's incredibly hard to come here legally. It costs an INSANE amount of money for someone who has no money, and it's a very long and painstaking process. I wouldn't necessarily say that they are demonstrating civil disobediance or anything like that, but they're doing what they think they should be allowed to do even though the government says they shouldn't.

How does this make them any different from someone who smokes pot illegally?

My main point is, the system needs to be changed. Make it easier for people to come here legally, and they'll stop coming illegally. If they stop coming here illegally, they are no longer undocumented. If they are no longer undocumented, they are no longer such a threat to national security.