There isn’t anything meaningful to worry about. No matter how much damage leftist rioting causes, the risk they pose can be measured, by the existentialometer, as exactly zero.
Threats posed by Republican candidates, on the other hand, measure as non-zero on this fair and balanced contraption. The exact threat level measured by the existentialometer is, for reasons of national security, kept secret. But it is greater than zero, and those of us with a conscience know how that compels us to vote.