Yeah, Artak is right. There are loads of threads on this topic in the General Scripting section (why is this in the MP section anyway?).
If you don't want to indulge in a little O2 modeling then that's OK cause BIS have done that for you. In the mission editor, if you insert a new unit and choose the East side, you'll see a unit called "East spy" or something like that. Its basically a West soldier that is classed in the config as an East unit.
So if you use these and set the Res side to hate everyone - you'll achieve the effect you are looking for.
Or you can use the deleteVehicle this command. There may be a problem with that though. (Although I'm not sure about this but..) doesn't that "trick" make the entire West side effectively "East"? I'm probably wrong, but you never know.