I fear you're correct. Screaming "whore" and "murderer" at scared girls entering and leaving a Planned Parenthood building is not a good way to win the public relations battle on this issue. Mainstream pro-life groups are smarter than that, but the zealots do more harm than good.
That's not what we do.
I agree. Instead of caring about the children and being compassionate, a lot of pro-lifers just scream abuse at women and their partners, doctors, nurses, and anyone else who works in the building. There are some pro-life groups that work through churches, providing pre-natal care and help to pregnant women in desperate situations, proving that they actually care about these women and their unborn children. People who "protest" at abortion clinics are usually just zealous bullies.