I think the pro-life moniker was mostly to counter the ridiculous "pro-choice" title adopted by the left. How ludicrous to be pro-choice when the choice is killing an innocent and defenseless human being. It's like being "pro-choice" about rape. "I don't believe in it myself but I think it should be left up to a persons own conscience whether to rape or not". Insanity.
Be that as it may, the left doesn’t have an exclusive on euphemisms, contrary to what the author implies.