I find it direct and nasty, but not mean-spirited. I think he does that because he cares about this, and hasn't managed to get his message across.

And I think he has good points. In particular, ports running make as root makes every buffer overflow in your C compiler, linker, and whatever other tools build scripts run a potential root exploit. Yes, other security measures such as pledge can decrease that risk, but why run the risk at all?

i'm a FreeBSD user since 4.3 or 4.4, and to me it reads quite fine. sure, the frustration shines throught, but he's got a bunch of valid points there.

The OP certainly wasn't trying to be neutral (wikipedia-style), but most of it reads as 'it is 2016, do you know what your operating system is (not) doing to protect you?'

Lower your defenses, consider the issues, address them.