What a completely narrow and closed minded view. Sarcasm can't be properly expressed through text without adding words or symbols that would tell someone it is sarcasm. When you speak sarcastically at someone you don't say anything different it's in the way you say it, get a clue.
The rest of the world needs the /s tag because their IQ is too low to comprehend sarcasm, and likely their culture doesn't tolerate it.
If you need the /s tag, this comment does not deserve it. I am being completely serious. You jews will never understand white humor.