It's my understanding that the "crosses" are on Public land.
In that case, the charge could be damage to public property depending on if he left deep tire ruts and destroyed vegetation bad enough.
Liberals hate the crosses on public property anyway. He did them a favor and the ACLU won't have to sue to have them removed. He was just enforcing that good ol' seperation of church and state. Those liberal vampires usually shreik and scream at the site of a cross.