Hold on, am I getting the impression that these jokes are supposed to innately trying to harm or degrade white people, and it's bad that white people are joining in on the fun?
No, hell no. The jokes are fun and awesome because it shows that no race is better than others, and that everyone has their quirks. Being able to laugh at yourself is a core part of being a decent human being.
Perhaps it is saying that it's not cool that people are trying to dodge insults by putting it down to a group rather than keeping jokes about race? I'm not too sure what to say about that, because people do tend to make jokes about themselves, and secondly, the white people in every single group will make fun of every other group until everyone is effected.
That is, unless we want to start talking about how starbucks and uggs is misogyny, and we shouldn't be making those harmful jokes about an empowering female culture, which I wouldn't put beyond the writers of this article.
And, if this is a case of other races trying to "get back" at white people, to insult, to degrade, etc, than it is wrong as hell and shouldn't be tolerated.
I preface this by saying I know nothing of your personal ethnic, cultural, etc. background. I've mentioned mine on Hubski before; it is similar to that of the author. The point she is trying to express in general is that white people lack the relevant cultural context to join in on the joke in the 1st place. A neutral similar situation would be when kids hear/see their friends using a new slang term. They may not have an understanding of where the slang came from but can observe (see: reading black twitter, listening to rap and Beyonce, etc.) use of the slang and feel empowered to use the slang with that amount of context alone.
A perfect example during my lifetime was the life cycle of the term "bling bling." To black people with the relevant cultural context of Southern trap style rap music, bling bling is an exclamation of acquiring items beyond the means of your immediate environment. Items representative of lifestyle that is perceived to be unattainable due to systemic oppressions. So when you got some dope shit, it's bling bling. It's use in mainstream rap, which was consumed by white america at large via entities like MTV portrayed it as black people getting shiny things. The previous cultural context never made it those people. I'm pretty sure if you asked a white person about the term they wouldn't give you an answer beyond shiny jewelry from rappers in the late 90s. So the term becomes devalued by their use and therefore played out (read: joke ran into the ground.)
So to bring it back around. This article is about white people making jokes without understand the intended humor and seeing only the surface context of potential situations for appropriate application. Specific to the "________ be like," which I believe originated as "niggas be like" among black people themselves on twitter mind you, the joke is about hypocritical and contradictory behaviors of your friends relevant to a larger event. i.e. "Niggas be like I'm broke, but drivin a BMW." That is the correct use of that joke with correct cultural context. And it's not even like white people can't make jokes with relevant cultural context, you see it in places like /r/AdviceAnimals all the time.
This article is addressing a frustration within the black community specific to appropriation. Whenever black people come up with something new within our communities, there's a legitimate acknowledgement, understanding, and anticipation that white people will eventually try to participate in it WITHOUT gaining the relevant cultural context. Fantastic current example: Twerking & High Fashion coming out with "Urban Caps" aka Durags and gelled baby curls hair styles for women because it's "in." But black people suffered scrutiny under the banner of respectability politics for those same items for YEARS. LITERALLY YEARS. Now /gif/ has twerking porn threads.
How about we draw a fine line between where jokes are harmful to a group, and where they are not, rather than using this shitty, and incredibly arbitrary (even situational) power definition.
Because, you can't just claim that because a black person is black, they have no power in a situation. People have power over others at all times, and you can hurt anyone even as the most poor, most oppressed, most pushed down member of society. Any decent person looks to others for support and consideration, not just those above them, and not showing them that support at any moment is not a good thing, regardless of circumstances.
No man, this is an honest statement, when white people become aware of cultural developments in black communities, it almost never ends well. History supports this statement quite well. Essays have and probably will continue to be written about it.
No one even claimed black people were powerless, that's not even a point of the article. It's about self awareness of the relevant cultural context required to appropriately make the joke. If you aren't coming from the same place; you aren't making the same statement.