This thread is starting to unravel, which usually happens on page 2 when abortion is the topic. So it's impressive it's made it this far.
Here's my attempt to keep it from going off the rails:
No one is going to change anyone's mind with this discussion. Everyone has already made up their mind, and no amount of logical arguments, appeals to ethics or morals, or any other debate process is going to change anyone's position. People do change their stance on the topic -- but that happens over long periods of time and from personal experiences in this area. So arguing with each other is pointless.
Many of the arguments here are attempts at verbal wordplay and "gotcha's". Trying to prove someone's strongly held belief is incorrect by trying to back them into a logical fallacy will not work. It just makes people angry, and then they lash out. Debating whether a zygote is a "human life" or a "ball of cells" is relatively pointless. Some people believe one of those, and some people believe the other. Neither can prove the other wrong. Both are certain the other is horribly wrong.
What we might be able to do is try to understand the other person's position / beliefs. I am pro-choice. I think a zygote is a ball of cells, and is not a human life. That's my belief. But I recognize that others feel strongly that a zygote is a human life. And if you believe that, then abortion would appear profoundly wrong. I can respect that opinion, and I can understand why people who feel strongly about this may want to make abortion illegal. I don't agree with it -- but I can see their point of view. Either viewpoint doesn't make someone a bad person. If you lose the ability to see the other side's point of view, the net result is usually demonization of the other side and the end of any healthy discourse.
And therein lies the challenge, for which I have no good answer. Some people believe abortion should be a choice. Some people believe it is wrong and would not choose it for themselves but feel that others should be free to do as they wish. And some people believe it is a wrong that is so bad, that no one should have the choice. The last group can't find any compromise / reconciliation with the others. They feel it is so wrong, they can't let others consider it at all. And although I disagree with them, I can see their point of view. To them, any downstream harms from outlawing abortion are much less concerning than abortion itself. I disagree -- but there's no universal scale on which to weigh decisions like this.
And because people feel so passionately about this issue, they are willing to fight for it with any tool available. And this will lead to crazy escalations on both sides. States are already starting to try to punish people who help others cross state lines for the procedure. What's sure to follow is pro-choice groups finding ways around this. I expect we will see attempts at creating abortion clinics on ships in the Gulf, or on Native American reservations. Would also be legal on any federal land - the USPS owns property, and I'm surprised that I haven't heard of someone suggesting using VA hospitals/clinics as abortion centers. All sorts of problems with all of these ideas. They are all terrible solutions which will only escalate the battle.
I have no good solution. Personally, I'd support legal abortion to the point of viability. Any cutoff is inherently arbitrary though -- if we say "20 weeks", there's no practical difference between 19w6d and 20w1d. But it seems wrong to me to allow abortions late term unless there are health issues for the mother (and in that case, early delivery may be an option). But I can see how others may see this as unacceptable.
I'd also support education and other measures to decrease the need for abortion overall as much as possible. But we don't live in a perfect world -- far from it. Given the world's imperfections, I think allowing abortion in early pregnancy is the better of the options available. You may disagree, and that's fine. I'd also prefer that the govt just stayed out of the decision completely -- although I acknowledge that results in the endpoint that I would prefer.