Show one moment of prejudice or distaste for the Uchiha post-genocide. The extinction of the Uchiha likely hit Konoha hard, a tragedy catastrophe akin to how 9/11 affected America. The K11 generation in the Chunnin Exams aren't even aware of the Uchiha clan and are all blown away by the first Uchiha they've seen (Sasuke) so it's not even really on the social conscious enough for racism/prejudice.
The Ninja world also didn't have a media system at this time so it's likely they were just aware of the Uchiha's conflict on a smaller scale and held soldier's respect from previous wars.