Even if you're very spirited in your support for your candidate, it's important to do your best to be accurate and careful in your response to your fellow party members.
You have a poor understanding of the American electoral process and should re-evaluate your stance in it if your goal is to affect change.
> ...unfair to tell them that they're bad for being skeptical of the cancellation of the most important poll and delaying the results...
I'm not saying they shouldn't be skeptical, I'm saying it is wrong to attack other democrats without evidence and point fingers at other candidates because you're upset that Iowa had a poorly run caucus.
I would also caution against assuming the outcome of any poll or caucus, most of all Iowa which is a tremendously difficult caucus to interpret.