1. Too many people don't get the connection between SOCIAL Security, Medicare, highways, dams, airports, roads, fire departments (things that they like) and the social democracy that it takes to run those programs.

2. The republican party has turned into a cult. Hysteria is the theme and socialism is one of the dog whistle buzzwords.

Why Republicans are resorting to anti-socialism hysteria - conservatives will say anything to justify backing a racist, loony president:
https://www.washingtonpost.com/opinions/2020/12/03/why-republicans-are-resorting-anti-socialism-hysteria/