As a moderator, I have now read the post in question in depth three times, once when it was posted, once when it was reported for moderation, and now, with you having specifically called it out. While the post takes a strong position, I still don't believe it deserved to be sanctioned. The writer made the case that tanking is cheating and that therefore if you are advocating for tanking you are advocating for cheating. I'm sure some will disagree in whole, some will disagree in part, and some will agree with this case, but it seems a fair point to raise.
It's true that the tone of the post was mildly combative. Then again, read through any discussion on tanking on KF.com in the last several months and tell me that the entire tone of the conversation is anything less than mildly combative, from both sides. The entire discussion is bordering on toxic, as evidenced by the fact that posters on both sides of the issue have either left the board or are threatening to leave the board over it.
Frankly, because of the toxic nature of the discussion and the seeming general inability of folks on either side of the issue to treat it in a restrained manner, I would prefer it if the entire discussion were off-limits for the time being. Of course, that seems to put us in the moderation business between a bit of a rock and a hard place. On the one hand, if we allow people to lash out at each other, then everybody gets upset. But if we try to tone down the conversation then we've turned the place into North Korea, and we can't have that now, can we? Outside of everybody voluntarily deciding to treat everybody - EVEN THOSE WHO DISAGREE WITH THEM - with respect, I don't think there's much of a way to satisfactorily solve this problem.
But I can't magically make everybody try to respect everybody else, and I really am at kind of a loss for what to do, so...here's a .gif of a puppy.