> In a discussion about whether or not Trump built a wall at US's southern border one does not need to bring up Jan 6th at all.
That's not how that discussion would actually go. Need has nothing to do with it, and the same holds true with Musk. The detached attacks don't need to be brought up in regards to a discussion about Musk & SpaceX, and yet they are guaranteed to come up regardless.
There is no discussion today of any meaningful length that is going to happen on a major public forum (eg Reddit) regarding Trump's border wall where the events of January 6 do not come up as a prominent matter of discussion.
The reason this happens is because the target (Trump, Musk, whatever) triggers people to such an extreme emotional degree they can't control themselves properly, they can no longer think & express rationally. They have basically been trained into a hyper emotional response by the mob they participate with. It's some manner of one-upmanship, virtue signaling as competition: who can most greatly beat this target to death, using any means necessary.