I disagree. This event does not support the Nemesis hypothesis. This might only add evidence to suggest that there is periodicity to Earth impacts. Although, it might not. As I understand it the idea of periodicity for impacts is debated and is not statistically conclusive.

There are other hypothesizes besides Nemesis to explain the supposed periodicity of impacts. Essentially, we need something to cause a gravitational change to the Oort cloud. Other possibilities include Brown dwarfs and black holes or precession in the rotation of the milky way.