Send images to friends and family, host them on websites. Then when lefties do "Peace march" image searches, they will see the profanity signs, etc. Middle of the roaders will be swayed.
For the most part, it is not only a waste of time, but almost impossible to get Republicans/conservatives to "protest" (well except for demokrats trying to steal elections). But we can all pass along information/pictures that the MSM will try to hide. Their ability to bottle up information is finished.