For the record I had unexpected results with the trigger as it removed resources and destructible rocks. Also I wanted to destroy all the units form just one player so I modified the trigger as it follows.
Unit Group - Pick each unit in (Any units in (Entire map) owned by player (player 2 from (allies of player 1)) matching Excluded: Resources (brute),Resources (collectable), Destructable, with at most Any Amount) and do (Actions) Actions Unit - Kill (Picked unit)
The problems with the resources and rock was solved altough I still don't know if the trigger just eliminates one player. I have implemented it in a 4vz4 melee map but when I test it I'm the only player in the map.