Basic psychology.
Anyone who has already decided that they like Elon (or MAGA) do not want to believe that they are the bad guy. So they will reach for even the worst of arguments to make themselves believe they aren’t the bad guy.
Remember: Nazis themselves refuse to believe the Holocaust happened. Same same really. No one wants to think of themselves as the bad guy.
Pretty simple. A jury is 12 rrandom-ish people (ignoring the Voir Dire process where lawyers argue about who deserves to be on the jury).
If you openly are for jury nullification, then the prosecutor will try to throw you out in the Voir Dire proces (its unfair to the prosecutor if you think that you can ignore the Prosecutor’s argument entirely). Then they select someone else to be part of the jury.
Secondly, all 12 members of the jury have to agree on the decision. So all 12 of you have to agree that the law is unfair in this case and opt for jury nullification instead. There’s examples where this happens: ex a child gets charged for child pornography when they send a picture of themselves. After all, they “distributed child porn” which is grossly illegal by the law, but the jury can agree “Yeah, they broke the law but don’t deserve to be punished in this case”. That’s the kind of thing jury nullification was created for, when everything is “technically correct”, but the jury is smart enough to realize that its not “Truly a crime”.
Now people bring up the Jury Nullification as a potential… erm… way to get someone out of a murder case. Highly unlikely that you’d get all 12 people agreeing on that. At best, you’d probably get a hung jury if say, 2 or 3 people agreed ahead of time to use jury nullification.
Furthermore, by showing that you’ve got “interest” in a case means that you’re no longer a random person off the street, but instead someone who may have been misinformed by media about a case. A jury must be ignorant about the case and have an open mind for the trial process to work at all. So people with pre-existing knowledge about cases are often thrown out during Voir Dire. This is because many pieces of evidence are often determined to be illegal. (Ex: if the police illegally wiretapped you, then the evidence CANNOT be shown to the jury, even if the wiretap was published in the media). So the evidence that shows up in court is itself part of a large process and selective ignorance is in fact key to the whole shebang. (How else can you punish a prosecutor for illegally obtaining evidence? Even if the evidence is true, it must be struck out of the record and the prosecutor is not allowed to use such evidence in their case).