I believe he did uncover ongoing criminal activity - illegal trafficking in human body parts. I don't think anybody is even disputing that.
"Center for Medical Progress" is a bogus entity which has diddly shit to do with medical progress. It was cover for a scam so he could meet with PP, which does provide foetal tissue for legitimate medical purposes, and surreptitiously film them while trying to make it sound like they where peddling baby parts for profit by asking questions and then editing the film to make it seem to support his fabricated claims.
This has nothing to do with abortion, it is illegal trafficking in human body parts.
No. His sole purpose was to do damage to Planned Parenthood, which provides family planning services such as education and contraception, which prevent unwanted pregnancies, as well as providing abortion services.