If we really believed that, the second Civil War would already have started. The news on a Trump supporter being shut out in Colorado turned out to be what a charitable person would call "misrepresented". It makes no sense to pretend Trump is running for the republican nomination and then for his people not to show up because they wouldn't have counted. If that was true, 1,000 Trump supporters could have come out of WY with lots of video of cheating. That would be a whole lot more effective than claims of "we knew they would cheat, so we didn't show up."
In the absence of contrary evidence, I'm attributing that state's lopsided outcome to incompetence on Trump's part (failing to show up), rather than malice on the part of those who organized and voted at the caucuses. It's a shame too. We'd both rather have Trump with those delegates to improve the odds of a first ballot victory for Trump.