You can start a charcoal fire with rubbing alcohol, due to the composition of rubbing alcohol, including flammable ingredients that will take a spark well! There are, however, techniques you can use that will improve your chances of getting a fire going with this method.
Burnt wood or charcoal has the potential to hold heat. This means that if you can apply a heat source to it, the charcoal can eventually become red hot and will have sufficient heat to ignite a fire. This has application for emergency situations or where you have issues with your tinder!