After the October patch for Sims 4, many Sims ended up fighting each other like there is no tomorrow regardless of their character traits. This apparently happened due to an unexpected issue, and Electronic Arts stated that they are working on a fix.
This fix is expected to come in early December, so until then do not expect your Sims to stop fighting each other like a bunch of mindless teenagers. Originally, this fix was expected to be ready on 18th of November but the process took longer and postponed the release to a later date.
This “hate plague” is going to be an absolute problem during Thanksgiving time, and it may actually be funnier to see those digital people fighting around a roasted turkey.
