One of the other issues is the fact that people always try to project their beliefs on others. I personally dislike abortion, but that doesn't mean that everyone else has to as well. I am mature enough to be able to have a strong opinion without feeling the need to make everyone else agree.
This is the issue at large. It's people using the law to force others into doing and believing as they do. Laws are not supposed to be a tool of oppression and control. It's supposed to protect.
If someone doesn't like abortion, fine. That person does not have to get a abortion. But it's wrong to force everyone to do the same.