I'm not asking for fear mongering. I'm asking for passion. Basically what Elizabeth Warren does, if not maybe SLIGHTLY more aggressive. But Warren is an outlier. All the ones who even remotely approach this kind of campaigning (Warren, Sanders, and Franken) are the exceptions, not the rule.
You can be fiery and not just 100% lie about everything your opponents are doing or inventing nonexistent threats are immediately about to kill you.
Oh---and they should swing more left. Democrats have basically become the center party when Republicans keep dragging everybody further and further to the right. You can be very liberal and not be a SJW. They are not the same thing.