In this context, he was talking about abortion, not Palestine:

https://www.romereports.com/en/2024/09/16/pope-francis-criticizes-trump-and-harris-both-are-against-life/

Both are against life: the one that throws out migrants and the one that kills children. Both are against life. I can’t decide; I’m not American and won’t go to vote there. But let it be clear: denying migrants the ability to work and receive hospitality is a sin, a grave sin. The Old Testament speaks repeatedly of the orphan, the widow, and the stranger—migrants. These are the three that Israel must care for. Failing to care for migrants is a sin, a sin against life and humanity.

I celebrated Mass at the border, near the diocese of El Paso. There were many shoes from migrants, who ended poorly there. Today, there is a flow of migration within Central America, and many times they are treated like slaves because people take advantage of the situation. Migration is a right, and it was already present in Sacred Scripture and in the Old Testament. The stranger, the orphan, and the widow—do not forget this.

Then, abortion. Science says that at one month after conception, all the organs of a human being are present. Everything. Having an abortion is killing a human being. Whether you like the word or not, it’s murder. The Church is not closed-minded because it forbids abortion; the Church forbids abortion because it kills. It is murder; it is murder!

And we need to be clear about this: sending migrants away, not allowing them to grow, not letting them have life is something wrong, it is cruelty. Sending a child away from the womb of the mother is murder because there is life. And we must speak clearly about these things. “No, but however…” No “but however.” Both things are clear. The orphan, the stranger, and the widow—do not forget this.

In your opinion, Your Holiness, are there circumstances in which it is morally permissible to vote for a candidate who is in favor of abortion?

In political morality, it is generally said that not voting is ugly, it's not good. One must vote. And one must choose the lesser evil. Which is the lesser evil? That lady or that gentleman? I don’t know; each person must think and decide according to their own conscience.