“Without Arabians, 9/11 wouldn’t exist. It would be IX/XI instead”

Jokes about the September 11, 2001 terrorist attacks on New York City’s World Trade Center are numerous, although not politically correct. A “9/11” number joke was posted on Reddit—Jokes on June 25, 2017:
   
“Without Arabians, 9/11 wouldn’t exist. It would be IX/XI instead.”
 
Similar observations had been made before this. “Why remember 9/11 with ARABIC numerals?? Should be ix/xi!!  God bless AMERICA!!!!” was posted on Twitter on December 24, 2009.
     
 
Wikipedia: September 11 attacks
The September 11 attacks (also referred to as 9/11) were a series of four coordinated terrorist attacks by the Islamic terrorist group Al-Qaeda on the United States on the morning of Tuesday, September 11, 2001. The attacks consisted of suicide attacks used to target symbolic U.S. landmarks.
 
Four passenger airliners—which all departed from airports on the U.S. East Coast bound for California—were hijacked by 19 al-Qaeda terrorists to be flown into buildings. Two of the planes, American Airlines Flight 11 and United Airlines Flight 175, were crashed into the North and South towers, respectively, of the World Trade Center complex in New York City. Within an hour and 42 minutes, both 110-story towers collapsed, with debris and the resulting fires causing partial or complete collapse of all other buildings in the World Trade Center complex, including the 47-story 7 World Trade Center tower, as well as significant damage to ten other large surrounding structures.
 
Twitter
CANDiD.NYC‏
@Candid_bk
IX.XI… 9/11… Sept 11… never forget
10:41 AM - 11 Sep 2009
 
Twitter
Bill‏
@BPn312
Why remember 9/11 with ARABIC numerals?? Should be ix/xi!!  God bless AMERICA!!!!
2:07 PM - 24 Dec 2009
 
Twitter
Vikas Agarwal‏
@VikasAgarwalll
Today is 9|11 .. Looks beautiful and symmetrical in Roman numbers .. IX|XI
2:25 AM - 9 Nov 2013
 
Twitter
Ⓐ #GrumpyCuntSec Ⓐ‏
@brazenqueer
YOU GUIZE.
9/11 IS A PALINDROME IN ROMAN NUMERALS.
IX/XI
#ILLUMINATI
12:55 PM - 11 Sep 2014
 
Twitter
Your Accountant‏
@TaxFarmDad
Replying to @wstafrican
Petition to start referring to 9/11 as IX/XI because Arabic Numerals.
2:47 PM - 31 May 2016
 
Reddit—Jokes
Without Arabians, 9/11 wouldn’t exist.
submitted June 25, 2017 by Sphericalz
It would be IX/XI instead.
 
Twitter
Mahir‏
@mxhlfc
Without Muslims 9/11 wouldn’t exist. It’d be IX/XI instead.
9:18 PM - 25 Jun 2017
 
Twitter
Bob Golen‏
@BobGolen
If there never were any arabs we would never have had a 9/11 ...
It would have been IX/XI
10:02 PM - 25 Jun 2017