They scaled the fence, but it's being reported that they are not entering the US. Two of them dropped into US territory, taunted border patrol a bit, then climbed back over the fence into Mexico. That could change, but so far they seem cautious. They must have heard that it is now "catch," not "catch and release."
The date on the article keeps changing. It is auto-updating to the current date. Earliest I've seen is Sept 27th.
Threat?
It's not confined to Jews, nor are all Jews involved.