You can be angry at the proceedure, you can be angry that the legal process is not in your favor. But when you vilify unjustly and without evidence other than your own bias or prejudice what it results in is the legitimization of heinus acts by just these sorts of terrorists.
For example, if you said, I understand why the 9/11 hijackers would dive bomb into the world trade towers and I agree that the government is corrupt and protective of oil companies and dictators of the ME. How is that different from what you are saying here?
On the other hand if your comment was, abortion is a heinus act that feeds frustration and anger for the killing of innocent which I would hope would be more of what you are trying to argue. That would be on par with I understand why people in the Islamic world have such hatred for America.
My indignation is not with your position towards abortion, but towards your vilification and demonization of Tiller and co.