You should ask why wearing a mask is liberal.
In the USA, everything is either liberal or conservative, and you're supposed to pick one side and stick with it for all things. So you can either be pro-life and think wearing masks is limiting your freedom, or you can be for abortion until birth and that masks are an important part of combating COVID-19.
Not really... I am a conservative, yet support secular legal same sex marriage because legal marriage itself has legal benefits and we live in a secular society not a theocracy so I dont think we should sideline a group of people from being able to obtain the same legal benefits as Christians.
I am also 100% against same sex marriage in the church; I won't even visit a liberal church that believes in female pastors or church sanctioned same sex marriage.
So in the political sense, there are differences of opinion among people who associate with a particular party. Just like there is an LGBT group who is likewise, pro-life, as well as the fact there are conservative homosexual individuals.
However, when your looking not at party affiliation but at religious affiliation, pro-life Christians you could probably count on one hand, and those that exist
probably aren't the most religious in other areas of their life,
the assumption based on their beliefs that have no biblical basis, but rather a secular humanist point of view and lifestyle.
Take God completely out of the equation and I'm sure killing anyone to further your own enjoyment of life is a meaningless thing, since the only thing that matters is your own happiness.
So, I don't think it's so much party affiliation, but rather religious affiliation that makes the largest difference here even though there are some non-religious people who don't believe in abortion.
From a legal standpoint, the unborn is in fact a living human being entitled to the right to live in the U.S., it's why a man who kills a pregnant woman is charged with double homicide instead of just the murder of the mother. The Supreme Court ruling allowing abortion on demand is inconsistent with U.S. law in this regard...