Contact...or is it?

“I’ve done it!” Steve yelled into the phone.
“Done…what?” I said, bemused.
“Come over to my place, you’ll see,” he said.

When I arrived at his place, I was greeted by a large satellite dish and a strangely shaped crystal, along with numerous devices I could not identify. Steve was sitting wearing headphones, tuning knobs and twiddling dials like an excited schoolboy. He noticed me, made a few adjustments and beckoned me over, producing another pair of earphones.
“What is it?” I asked.
“Shh,” he whispered. “You’re interfering with transmission. I’ve managed to intercept communication from an alien race. We’re about to make contact.”
He was very vague when I asked about the particulars.
“Neutrino beams…perfect crystal…never mind. It’s coming from just outside our galaxy and seems to be getting closer. Listen.”

I donned the proffered headphones. The signal was complete nonsense.
“Wait a minute, I’ll turn on the universal translator.”
Steve flicked a switch.

“I don’t like these life forms, X-314.”
“Me neither, Z-159. That’s why we’re out to destroy them – nothing stands a chance against our ultra-high power Dimensional Destroyer Death-ray.”
“Excellent, let’s obliterate them. What are those creatures, anyway?”
“I’ll look it up…here we go. Apparently they’re called humans.”