Because it worked so well in 1968..................
Americans are more connected than ever before. Everything about the Dem strategy is backfiring, because people are talking and realizing, “Hey, this is what they’re doing in Venezuela. That’s not going so well...”
The very mechanism the Dems have worked to bolster (Internet and social media) is now backfiring on them, so the socials are pulling their support and trying to tamp down criticism.