For role-playing an extermist/rebel, a player needs to role-play a solid background. This is the specific role, where you need to walk an extra mile before you can kill somebody. If you blow up the first person you see on the server and claim it was an act of terrorism, it is just a poor excuse to deathmatch.
Some pointers, I could give are:
- Open an extremist group on the forum, recruit some members so admins would know that you exist and what you stand for.
- Make some demands. Political demands, demand to pass a law, lower taxes, construct a mosque or whatever. Even terrorists in real life justify their cause. If you want to roleplay a terrorist, you have to justify it. Call the Chief of Police, or make a peaceful rally/parade to get the message across.
- If your demands were ignored, you can take the violence route. Take claim of a bomb blast, write a blackmail note in a crate and drop it in the VCPD HQ. There's a lot of stuff that you can do if you stretch your imagination.