Most people aren’t all that well informed and don’t do a lot of crtical thinking about their political positions on things. Many people are only guided by their emotions.

If your Church says that life begins at conception, then abortion is killing babies. So you’d be angry about abortions happening.

If you hear a horrible crime, you’re angry about that and might want the person that did that crime to be executed. If you never hear about or think about innocent people being execute, never consider the ethical problems with a government killing people, never consider the costs of it, and all the other arguments against the death penalty, then you can go through life thinking there’s no problem with it.

And even if you hear the rational arguments, they get overpowered by emotion the next time someone says “abortion is murder” or you hear about a horrible crime happening that might qualify for the death penalty.