I believe in the first ammendment right as well. I believe that you should have the right to voice your opinion and stand up for whatever you believe in, even if that belief is that women should have the right to have an abortion.
Voicing your opinion is one thing. Stopping another from exercising that which they choose to do such as have an abortion is another. If as you say let the TV ads you favor run that is fine. This comes down to 'informend choice' on a woman's part IMO. You wish to inform me if I were a wanting an abortion you believe it is aginst gods will and you think I am wrong--that is also your choice to do so.
On the other hand those who are choice have the same right, to tell these women this is a fetus, not a baby, that one has a choice.
Blowing up clinics, killing doctors, killing women who want to assert their chioce, throwing acid, burning clinics, using hate and threats and using force tactics are not acceptable. Tactics so extreme and murderous that I see no difference between them and Terrorists like Al-Queda-- They are using fear as are some Pro Lifers. Why worry about being blown up by an airplane on 9-11, when you can be blown up trying to save your life or exercising your rights?
http://news.bbc.co.uk/onthisday/hi/dates/stories/december/30/newsid_2547000/2547637.stm