Lifers can be disrespectful, as can the other side. Both sides need to learn to protest peacefully.
Lets not try to justify the behavior of one side by criticizing the other. There's a verse in the Bible that says to clean up around one's own front door before he can criticize someone else. First, Wild Wendy filibusters an abortion bill whilst her army of women raid the Texas State Capitol to interrupt the internal processes of their government. Now, we have similar people heckling someone who is simply singing a hymn.
Can you show me examples of pro-lifers acting in such a fashion? And no, the abortion clinic bombers are idiots, who don't count. I'm referring to people in their right minds doing this crap.
Abortion clinic bombers are idiots? But they are saving babies - they are doing Gods work!
But since you asked...I can think of an occasion a couple of years back, I believe this was a march on women's rights, celebrating the anniversary of our abortion reforms (abortion is on demand up til 24 weeks in my State). There was a pro choice march, very peaceful, and about 100 lifers turned up and turned the march violent, causing it to be disbanded.
On the other hand, there was a small pro life march some time ago, and the pro choicers turned up and the march again became violent.
So you can see that both sides can act like idiots.