The word "out" seems to be out of place to me.At the Bataclan and at the cafes the Islamists killed young adults, out being European hedonists.
1. It is made to appear like a statement which is true all the time, a fact.1.I don't like you because you are a lazy person
2. I don't like you because you are being a lazy person.
2. "Being" implies something is true at that instant.