Here are a few facts to consider before making accusations of voting irregularities.

The laws that do not allow Independents to vote in party primaries were in state statute for decades. I have lived and voted in both AZ and NY. Anyone who wanted to vote in the primaries could readily have changed their party affiliation and done so. Don't blame the Democratic Parties in those states. The primaries have been closed for decades in order to prevent party bosses from registering the dead and voting on their behalf.  

Most people in Arizona vote by mail-in ballot. Usually the polling places are close to empty. In Phoenix...a Republican stronghold...there were an inadequate number of polling places open. That may have impacted the results in the Republican primary, but almost certainly had little impact on the Democratic primary...which Clinton won by a large margin. 

If people lost their chance to vote through ignorance of the rules who fault is it?