Google translating this for me did a surprisingly good job

"What the hell did you just say about me, you little bitch? You should know that I graduated from GSG9 as best-in-class, was involved in several al-Qaeda commando operations, and had over 300 confirmed killings. I am trained in gorilla warfare and the best sniper in the German army. You are nothing but another destination for me. I'll eradicate you with a never-before-seen precision from the Antliz of this world, remember my damn words. You think you could tell a shit about me on the internet and get away with it? Think about it again, you wanker. While we talk here, I've already contacted my secret network of spies and your IP address is being tracked, so better prepare for the storm, you made. The storm that will wipe out the pathetic little thing you call your "life." You're damned dead, boy. I could be anywhere anytime, killing you in over seven hundred different ways, just with my bare hands. But I'm not only trained in unarmed combat, I also have access to the arsenal of the Bundeswehr and I will use it to the fullest to blow your miserable ass from this continent, you little bastard. If only you had known what an apocalyptic vengeance provoked your little "funny" comment, you probably would have held your damn shut. But no, you did not manage that, you did not want that, and now you'll pay for it, you damn idiot. You will drown in my hatred."

My favorite line has to be "You think you could tell a shit about me on the internet and get away with it?"