In all reality, nothing would have changed for the regatta results. There was much more racing in light air for the rest of the regatta. It might be a little different if it was all hanging on just one race.
This is a dangerous escape route to take, I think
Either the results of that race didn't change much and so it can both be assumed that it was equally fair to all and the protesters just wasted everybodies time and spoiled all their enjoyment of the event for no good reason. I would call that unsportsmanlike.
OR the result did make a significant difference with the light air crews doing really well and a certain portion of the fleet were denied of their hard earned results via a protest. Note that not the RC threw the race which they would have done if THEY had felt that the race was unfair.
Wouter