Here are a few of my thoughts that might help you think through this yourself, @Eaglejet23. I am opposed to abortion. I believe it is a grave evil. But I disagree with the strategy that is usually taken up by those opposed to it, and that is on display here. We as Catholics need to be more persuasive on this point and try to think outside of the box to persuade others about the truth regarding the dignity of the unborn. This requires real rational engagement with the other person. Implying that the other person is in the company of Nazis and the like will not persuade people.
The unborn child, particularly in the initial stages, is obviously a person in a way completely unlike a grown adult is. We are not in the habit of calling a seed a tree, although the seed and the tree are the same being at different stages in development. To insist that the unborn child is a person, without any qualification or nuance, is just dishonest. Much has been made in recent history regarding the theology of the person on this point: that the person is principally relational being. It is at the center of what it is to be a person that the person relates to others. That is the most marked characteristic of the Triune God; that in the most Holy Trinity the Divine Persons relate to each other with an intentional and reciprocal exchange (relation) of love. This relational aspect of the human person is simply not developed in the unborn child. The unborn seem, on first impression, inert and completely passive. Perhaps on this point @Eaglejet23 you can respond to people by pointing out that the unborn actually do respond to the caresses of their mothers and thus display an elementary reciprocity. I’m not saying the unborn child is not a person, but if the pro-choice person hears you lacking any nuance, they will not take you seriously as an intellectual equal.
Secondly, some people will agree that abortion harms the baby, but they will ask whether is always wrong to do something which harms another. This is a common line of argument. They may agree that abortion is the killing of an innocent, but they may disagree that the killing of an innocent is always wrong. They might respond, for example, by suggesting that the reasons are disproportionately in favor of the mother, since the unborn has no conception of its loss and will experience likely little to no conscious suffering. Last week or so I saw an article written on First Things by a person who claims to be staunchly opposed to abortion, but the article was in serious defense of Truman’s intentional killing of thousands of innocents at Hiroshima and Nagasaki. This is the sort of duplicity that scandalize pro-choice people and lead them to think that it can be just to intentionally kill the innocent.
All in all, I really encourage you to remember the word you originally used: “dialogue”. Dialogue means listening to the other person, and not just looking for a way to rebut everything they say.