My bet? It is happening far more than we know, only kept quiet. Think about it, if they let that type of info loose (increase in death threats), many more will become emboldened. The way it is now, most think it is not happening at all.
As a guy who died in the Witness Protection Program once said: “killers don’t talk and talkers don’t kill.”
You may be right, of course, but I sort of doubt it. Why? Because the Dims would be trumpeting this to and in every available news outlet as “proof” of how evil and wicked and nasty and violent the “right wingers” really are. They’re trying very, VERY hard to do just that.
Just my opinion.