Nowhere does the Catechsim say torture of prisoners and abortion are morally equivalent. Certainly, it does not mention waterboarding or sleep deprivation (which are the things the left mentions when talking about how the U.S. tortures people) at all, anywhere. There’s a lot of difference. The guy who’s waterboarded survives the experience. The aborted child doesn’t. There is just no way that, e.g., my punching someone in the nose (which many would classify as torture) is as serious a sin as murder.
The Pope has not said either the wars in Afghanistan or Iraq are unjust wars. Nor does the CCC say it. It could be argued either way. Abortion cannot be argued either way. Both the Pope and the CCC say abortion is gravely immoral.
If you are going to vote for abortion, and it seems so, just do it, and admit that’s what you’re going to do.