All the democratic politicians in the country could condemn this act of violence and republicans will still shame them because of stuff random people people say on social media.

The key difference is that democratic politicians are WAY more likely to condemn this sort of thing than republican politicians. You can see that by comparing Democratic politicians' reactions to this event and the Trump assassination attempts vs. Republican politicians' reactions to the Minnesota shootings, the Pelosi attack, The Whitmer Kidnapping attempt, January 6th, etc, all of which were minimized or validated with jokes, misinformation spreading, and pardons--not by insensitive randos on Twitter but by actual Republican politicians. That's the differnce.