Avirah,
How can you say that he is misunderstanding the pro life position among goyim when he is referring to a case where the pro-life community went to war against the Jewish family to prevent them from performing an abortion and saving the mother ?
There were some from the pro-life community who agreed in the Klein case that they should be allowed to perform abortion because the Doctors felt that the Mother’s life was at stake. But there were others, who held exactly the way Rabbi Tendler described, and they hired very expensive lawyers and sued to prevent it. It is possible that if this case would have been before RvW or in a post RvW world, the pro-life people would have won and murdered the mother to prevent the abortion.
Rabbi Tendler also critically said that the definition of saving the Mothers life Al Pi Halacha is not the same as the Goyim’s definition.
Regarding Rav Tendler extrapolating from Rav Moshe, I already agreed that is a possibility. But you also are only extrapolating.
I don’t know where you see a contradiction in his words in the article.