Having said that, there is no evidence that rape IS an advantagous behaviour to the rapist in evolutionary terms.
Not as a primary strategy certainly. But for someone who otherwise has little or no chance of breeding, it necessarily improves his chances of reproducing. Out of all the men in history who were unable to get consensual sex from a fertile adult female, the only ones who passed their genes on were those who raped.
Among the general population, any male who was willing to commit this crime and able to do so without getting caught would have a significant reproductive advantage over those who were not. Depending on the environment and the culture, the advantages may have outweighed the risks.