I'm a little worried about politics being the mind-killer here. So I'm not going to get too involved. But I'd point out that not everyone who is pro-life is certain that abortion is murder. Moreover, you are talking about legislation, and legislation always involves compromises. So having a punishment that is less harsh than what their articulated beliefs would call for is not an indication of hypocrisy.

Now, what is hypocritical and is very similar, is that the people who say that abortion is murder aren't out spending time bombing clinics. Whenever a clinic is bombed or a doctor killed, they rush out to say that they don't support it. But if they did actually believe, then they would. However, there may be some degree of scope insensitivity and other cognitive biases at play here rather than simple hypocrisy.