The Lowest Form Of Wit

So there's this former mayor of New York, and he walks up to a microphone and says, "eight years before Obama came along, we didn't have any successful radical Islamic terrorist attack in the United States." Barack Obama was elected President of the United States in November of 2008. Eight years before that was November, 2000. George W. Bush was the president back then. In September of 2001, seven years before Obama came along, America suffered its most catastrophic loss of life in one day when radical Islamic terrorists flew jet airliners into the side of both World Trade Center towers. The World Trade Center towers located in New York City. The former mayor of New York City could be forgiven for forgetting this little dustup, except he has made a career in the fifteen years since those attacks of reminding anyone within earshot about them. If there was such a thing as a "Mister 9/11" scholarship competition, Rudy Giuliani would have my vote. The former mayor of New York City will probably get my vote for the most unfortunate bit of calendar math over the past decade or two. The former mayor of New York City will not be getting my vote for President of the United States, nor will he be influencing that vote in the direction of his creatively-coiffed partner. 
Of course, it could be that he didn't mean it all. It could have been sarcasm. The former mayor of New York City may have been attempting to use sarcasm. To wit: " the use of words that mean the opposite of what you really want to say especially in order to insult someone, to show irritation, or to be funny." Since there obviously was a successful radical Islamic terrorist attack in the eight years before Obama came along, he may have been trying to be funny. Or insulting. To whom, exactly, is unclear. Or perhaps Rudy has just become so rabid on the loco weed that they must be feeding him that he is losing track of his holiest of holies. All that frothing at the mouth seems to be SOP with the GOP.
Or maybe it was sarcasm in the same way that referring to Barack Obama as the founder of ISIS was sarcasm. Maybe we just don't get it. And maybe that's just fine. It's been eight minutes since the last idiotic utterance from the Tahrump campaign. Was that sarcasm?