I think the question is what would you get dirty for?
I don’t say this in the same sense as picking up arms or committing violence. Rather what causes the individual(s) to realize “I cannot let this continue/I must act”. For the right its much easier to galvanize their base because they’re striving to achieve a monoculture and subsist on a diet of fear and anger; two motions that prompt immediate reactions. For the left things get less uniform.
The left may have a laundry list of issues that can fulfill any outrage requirement, but we’re also such a big tent coalition that not all issues have the same impact or longevity. We can all agree that immigration reform is a necessity, but immigration impacts myself and my family more than someone 5th+ generation American who generally agrees with me. Similarly, I can agree that we need to end institutionalized racism against the black community. But I am blind to the true depths of the issue, and much more likely to disengage after the initial outrage because of my distance from the issue.
If we’re going to galvanize the left we need to be able to clearly display the connections between each broader issue through their sub issues. Take this chart for example:
I’m not saying it has to be this detailed. However, it should help left leaning individuals realize that we cannot have unattended matters while working towards our preferred issues. This also creates callbacks to action that should reengage voters when their auxiliary issues come up on the ballot.