There are definitely words that describe bad acts that we use casually that are acceptable, as
@Patsfanin Philly has listed eloquently as alternatives, so why should those be okay while others are out-of-bounds? I think it has to do with groups of people who have been traditionally singled out and are sensitive to remarks that imply that serious acts of evil that have affected them are being laughed at callously.
When you use the words that you guys have listed, these apply to the general population of people. They are seen as obvious metaphors that can be applied universally. Things like "we are going to kill them" or "win the war" or "murder them" are seen as obvious acceptable terms, as no group is really singled out. In addition, sports is often compared to war battles, for better or worse, and that doesn't seem offend anyone.
I'm willing to bet that a huge majority of women would object to people using the word
rape in a casual setting when describing a sporting event. Why? Because it happens to them...it's always on their mind. If they haven't been raped, you can be sure one of their friends has been raped. It's a ****ty word. Women carry pepper spray for a reason. There have been studies that women fear being raped on an hourly basis. When men joke around about rape and use it as a casual sports term, it would clearly make them feel unsafe. I'm sure you can have examples of "not the women I know" or "my wife would never..." but I'm not buying that counter-argument.
It's the same thing with other people who already feel vulnerable and would rightfully offended when certain terms are applied casually in a rah-rah way.
I already brought up two examples: "Gas Chambering" and "Slave Whipping." There are others:
"We are going to lynch them from an apple tree like it's the 1920s deep south."
"We are going to gay bash the Jets entire team and drag them from a pickup truck."
"We are going to turn Arrowhead Stadium into Hiroshima."
"We are going to make the Cowboys running game as immobile as Daryl Stingley."
"We are going to take down the Dolphins like they are the World Trade Center on 9/11."
"We are going to take down that entire team like a massive outbreak of AIDS in San Francisco."
"We are going to be all over them like cancer remission into stage 4."
Is there any question that these terms shouldn't be used and for self-evident reasons?
Maybe the theme here is becoming clear, that generally it isn't funny or witty to insert jokes about really crappy events that have likely affected many people in their lives, and that there is a big difference between this and saying "we are going to slaughter them" in a general sense. I think it's pretty obvious that there is a line we shouldn't cross, and I don't think people are "overly sensitive" in trying to be civil and not offensive...it does make them part of the political correct police...it makes them aware of why these terms are damaging to people and not something to joke around about. The term "rape" is probably the most offensive of all terms, since at least 50% of the population would be not only disgusted, but likely frightened, by its casual use in this context, as an end goal of what we want to do to the other team, metaphorically or not, doesn't really change the idea that it is a really crappy thing to promote.