I don’t know if this makes things more or less clear, but based on @Vert finding the source of the decal, I looked up the producer of it, “End Parental Alienation”. I half expected to find a thinly veiled MRA group, but instead found a perfectly legit looking child psychologist named Linda. http://endparentalalienation.com/
This doesn’t rule out an Incel/MRA type, since they have a long history of missing the point of other peoples’ symbology, but here we are.
Maybe this is Linda’s Jeep? She’s apparently based in NY though, not LA.
