I will quote here the contentious paragraph:
As for the School of Hanafis [jurisprudence], they have prohibited the combination [of prayers] absolutely, with exception being at `Arafa and al-Muzdalifa. [This is] despite the presence of numerous clear sahih (authentic traditions) which allow the combination, especially when traveling. However, despite the clear [traditions], they (the School of Hanafis) interpreted them to refer to an unintentional combination (al-jam' al-suri). The invalidity of this [view] will become clear to you soon, God willing.
This is condescending. There is no other way to describe it. Do you honestly think that any Hanafi who reads this is going to think "Man, I sure feel like my beliefs are being respected here"?
The entire point of that paragraph is to prove that the Hanafi beliefs are wrong and that Hanafis should feel bad until they agree with whoever wrote the article. This is pretty much the textbook definition of what Be nice is intended to prevent: "Language likely to offend or alienate individuals or groups based on…religion…will not be tolerated. At all."
The fact that you're hiding behind the fact that you were only quoting someone else instead of espousing the opinions yourself doesn't change the fact that you, personally, are the one who posted it. If you can't even understand what you're posting — not even to the point of being able to write it in your own words — and especially if your unwilling to stand behind it after you've posted it, you probably shouldn't be posting it in the first place.
tl;dr: You posted offensive content, and it was flagged it for being offensive. Simple as that.