The Republicans could easily make ads showing all the times the Democrats used or threatened violence on Trump and Republicans, but they won’t do it.
None of the networks will show such an ad - ABC, CBS, NBC, CNN, FOX, ESPN, HBO, etc. will never let this ad air, and neither will any social media channels. Perhaps you can run it on TBN and the 700 Club, but that is it. Only a few thousand will see it, mostly preaching to the choir.
Actually, the current crop of already elected republicans don’t do much of anything other than waiting for handouts from democrats for staying out of their way.