If you walked by a store front window and saw children being killed, would you think it was murder if the only way it could be stopped was by force? What would be the difference if the store front window was a abortion clinic, and the only way to stop the killing was by use of force?
Now if you approve of the rescue of the children outside of the womb by force? Then why not the rescue of the children inside the womb by force?
The pro abortion/pro choice approve of rescuing children outside of the womb, but not for those in side the womb.