User blog comment:Markurion/Extended Cut or Prolonged torture?/@comment-4950606-20120406181240/@comment-1221773-20120407225820

The geth are the exception to the rule. Hostile synthetics appear to be the norm, especially given Javik's dialogue. The Catalyst is basically saying that no matter how the galaxy gets along the geth or other synthetics at that time, eventually a race of synthetics would be created that would wipe organics out. This may not occur for hundreds of even thousands of years, but the Catalyst is certain that it will happen.