Not having any strong feelings about the birth, life or death of the royals is an extremely mild sentiment that is shared by millions in the UK and billions across the globe. If you find it shocking, offensive or vindictive then I don't think the internet is the place for you.
The original commenter is an Indian who would have more reason than most to despise the Royal family and, frankly, the UK in general. Yet they showed genuine compassion and goodwill towards Philip. This was surprising and I thought it interesting to share that as a Brit I have nearly no feelings at all (other than my general dislike of the monarchy). This is a forum, we interact and share our opinions through these comments and what I said was pretty uncontroversial.
If you are bothered by his passing then fine, I'm sorry for your loss. But maybe trying to pick fights on HN is not the most productive way to grieve.