Aww... it is important to remember that this was only around 10 people who disrupted the march, I don't think most people there were on their side.
On the other hand, later in that same article, they talk about how the police and army shouldn't be involved in Pride, and I'm unclear on whether they mean that the police and army as groups shouldn't be allowed to march in Pride, or whether individuals who are in the police or army should be banned. I'm not sure either is a great stance to take, since it distances us from people that we need to have on our side, regardless of past behavior. The medical community hasn't been kind to the LGBT community in the past either, but the response to that has never been "doctors and therapists are our enemy, avoid all contact, end of story."
I dunno, I've always been hesitant to take part in organized protests and pride marches because it seem like my complex, individualized opinions and feelings get drowned out by simplistic nonsense I disagree with. Why participate in the event if in the end, it doesn't represent what I want to say?