This apology should not have been issued. The authors did nothing that merited apologising for. By doing so - even in a rather "notpologyish" way - they have bought into the idea that people should be apologetic merely for expressing unpopular, perhaps offensive views. Which entails that such views should not be expressed - a dangerous conclusion to be stuck with.
That does not mean that I fully endorse their views in the original article. I don't: the situation is much more complex than they acknowledge, and I am surprised that they did not discuss the sorts of views about the moral status of babies that I elaborate here (full article behind a wall) and (briefly) here, and similar views that others have put forward (e.g. those of Mary Ann Warren; Warren, at least, should probably have been discussed). However, my agreement or otherwise is not the point, and the original article by Giubilini and Minerva was a legitimate academic contribution that probably merited publication.
You should not have to apologise because your thoughtful, civilly expressed views on a tricky bioethical issue have offended or outraged a number of people. By buying into that idea, the authors have made it that increment more difficult for the rest of us to put forward unpopular, perhaps unsettling, perhaps even incorrect, views in the future. That is bad for freedom of speech and the marketplace of ideas.
So should they now apologise for apologising? What a mess!