Xtians (including Catholics) believe abortion is a sin based on the 10 commandments. Almost all are pro-life, based on their belief that Hashem made the decision to put them in that situation.
The rest of the goyim don’t believe in G-d, or just don’t care enough about religion, so they’re aborting children produced out of marriage or born into situations where they don’t have faith to help them through. As a result, they don’t care, anything goes because it’s legal. But I would not want to be judged on their beliefs.