I personally don't see Kay as an activist or attending a demonstration, he's too reserved. He doesn't feel the need to be part of a group; he might support in other ways, but to march in the streets? No, I don't think so.
Hi butler,
You are right Kay is reserved, leading a demonstration is not his style, but attending is another thing. He might be just getting invovled. In the first movie we are given too little background of him, but one thing we know for sure is that he is not quite fit into the police lifestyle, therefore you can see him smoke marijuana outside the swimming pool, tease the trainer who had a talk with him after his absence from the class, and beat that homophobie colleage down in the canteen. Apart from Marc and Britt, he seems isolated from others. Remember the talk in the woods right before the first smoke kiss?
Kay: Ever heard of infiltrating the system?
Marc: Are you an anarchist?
Though it sounds like poking fun, I think Kay is actually not in the system, he is like an outsider, doesn't belong to this place. When he leaves Ludwichberg and heads to Berlin, it is not only Marc that is being left, he actually wants to start a new life in a gay-friendly city. Keep on living as a riot-police? Seriously? He abondon the house, the person he cares for so much, but not giving up a career that caged him? Come on, such a free spirit should not be tamed by all these rules.
It might be a better choice to be a photographer, a journalist, or a bar owner.
And this time he must has his circles, and a new date is also an almost nailed pattern in a sequal. What comes across my mind exactly is that Kay moves to berlin, meets someone new totally different from Marc, maybe a power bottom LOL. Then his new date, or maybe friend join in that marching, and he accompanied. And Marc with his helmet on recognised him in the crowd with someone else, completely shattered to find they are so close yet so far.
Sorry for being poor organised, and weak in grammer. I've been here for a while and read all these comments page by page. Finally i decide not letting language skills ruin my journey into that movie with you. Now i feel i'm in the league.