I checked to make sure in his post history that he posted in another language as well before commenting. It's unfortunate he got offended, but usually people want to know if they're messing up in their second language, especially English.

You can even tell he didn't know which "than" I was talking about in his next reply, until sometime explained it to him. Both times played off as "I'm tired" ... it's okay, he didn't like it, that's fine