Hard agree. I have pushed for using the tactics of the enemy against them for a long time. It is usually met with "high road" flavored resistance.
Let's appropriate the word "re tard", apply it to Republicans. "That's what the (R) next to their name stands for after all." This shit practically writes itself.
When someone says that's offensive to people with mental disabilities, act incredulous. "Why would I refer to someone with a mental disability as a re tard? Not everyone with a mental disability is a Republican."
I think the battle over the real meaning of DEI is lost. I know many organizations (e.g., libraries) have begun to pivot to using different language to achieve the same goals. So the idea of using those three letters against MAGA while it they remain in the zeitgheist is appealing to me.
As for whether performative racism is a bridge too far, I'm torn. I partially agree with you, given it's potential impact on innocents that are exposed outside of the intended MAGA audience. But I don't think it would make us racist in the same way that a soldier who kills enemy soldiers in war is not a murderer. They are a killer, certainly, but not a murderer. Of course, there is a sacrifice of character being made there, but not so much as in the case of the murderer.
It would be a recurring performative insult with MAGA as the intended audience to disrupt their resolve. I don't think it has to say anything about your character.
I would let green Shakira do terrible things to me.