Most of the world’s population is non-Christian and supports abortion in many/most cases. But a vocal segment of Christians are trying and succeeding in imposing their religious values about abortion on the rest of us by any means possible.
They have gained disporportionate political power by organizing and lobbying. But their views do not represent those of the majority of Americans. Or of the world.
Political discourse is natural. But any and all Christian arguments about abortion are invalid because they are based on false doctrine. Any Muslim will tell you that the Bible is false. And any Christian will tell you that the Koran is false. And they are both correct. But they are each blind to their own situation.
We as secular thinkers need to remind them of this issue in all conversations. No matter how they quote the bible or cite their values, they are based on false assumptions. Their god is cultural fiction.
Christians are wrong about abortion because their god is false (non existent) and without authority in the real world.