All information taken from leddit so take it with a grain of salt.
One of the shooters is dead, picture related so don't open it at work or out in public. Not really Caucasian complexion but it's too early to say for sure.
Translation of is:
Gunman: Wegen Leuten wie euch wurde ich gemobbt 7 Jahre lang. (Because of people like you I was bullied for 7 years)
Guy: Du Arschloch, du Wixxer (You asshole, you wanker)
Gunman: Und jetzt muss ich ne Waffe kaufen um euch ???umzubringen??? (And now I have to buy a weapon to ???kill you???)
Guy: Dir gehört der Schädel abgeschnitten, du Arschloch (Someone should cut your head off, you asshole)
Gunman: Scheiss Türken (Fucking Turks)
Guy: Scheiss Kanacken (Fucking [don't have a proper translation for that: something like sandn*ggers])
Guy: Er hat eine geladene Waffe (He has a loaded gun) Holt die Bullen! (Bring the cops!) Der Wixxer (This wanker)
Gunman: Ich bin Deutscher (I'm a german)
Guy: Du bist ein Wixxer, bist du (You're a wanker, that's what you are)
Gunman: Hört auf mich zu filmen! (Stop filming me!)
Guy: Was macht dich deutsch? (What makes you german?)
Gunman: Ich bin hier geboren worden. (I was born here)
Guy: Na und? Was machst für einen Scheiß? (So what? What shit are you doing?)
Gunman: Ich bin hier aufgwachsen in der Hartz4-Gegend (I was grown up in the Hartz4-area/Ghetto [Hartz4 = unemployment benefit])
Gunman: Ich war in Behandlung (I was in therapy)
Guy: Ja, Behandlung. Du gehörst in die Psychiatrie du Arschloch. (Yes, therapy. You belong to psychiatry, you asshole.)
Gunman: Ich habe nichts getan. Halten Sie die Schnauze. (I did nothing. Shut the fuck up!)
Guy: Du Wixxer, du (You wanker, you)
Probably going to be more ammo for the right to spread fear but there are no clear Islamic ties or motives though no one will be surprised if it's yet another crazy Islamic cunt.
I feel sorry for Americans, you guys have a real chance on Trump winning because this shit keeps happening.