Your research is deficient to say the least. You show no efforts, no data references, no related reports or commentary. You present zero analysis.
The Democrats that crossed over became Republicans for the primary. The increase in registered Republicans from 2008 to 2010was far above expected. Democrat commentary such as found on DU are replete with claims of crossing over to vote for McCain who voted and pushed illegal amnesty against Hayworth who was 100% against illegal immigration.
https://freerepublic.com/focus/f-news/2503154/posts
Weiers, a former House speaker, called the complaint “cynical” and said people have a right to run under whatever political banner they choose. “If somebody wants to do it,” he said of the last-minute registration change, “there’s nothing illegal about it. There’s nothing immoral.”
https://www.tucsonweekly.com/TheRange/archives/2010/08/31/az-democratic-party-republicans-recruiting-sham-green-candidates