AITA for lying to my son and beating him to a pulp?

So I (2000+M) have been lying to my son (17M) all his life by telling him that I came to this earth to protect everyone and be a hero. Although that was a lie because I was actually here to prep this planet for an invasion for our people to colonize it.

So anyway when I told my son the truth he grew uncharacteristically angry at me and we fought. The fight was really messy, and I proceeded to beat him to a bloody pulp while implying that I didn’t care for him and could easily have another son. I also used his body to kill a subway full of people but I promise I did that for his own good. Anyway afterwards I fled the planet and now I’m starting to think I wasn’t entirely in the right. Am I the Asshole?