denial of constitutional right to vote

While checking my facebook feed, I saw a post from one of my professors from undergrad. http://thinkprogress.org/justice/2012/05/27/491012/exclusive-florida-ineligible-to-vote/?mobile=nc here is the link for the article he posted.  While reading the article one of our class discussions very quickly came to mind.  When Maria asked us to think of a time that a right was taken away.  The article pointed out that many citizens in Florida may be denied their constitutional right to vote for their president.  The only refuge these people have for the time being is to respond to a letter mailed to them “within 30 days”.  Knowing that things get lost in the mail and how many things accidently can go unopened until the time is too late this seems crazy to me.  Perhaps the most outrageous part that the article brings to light is that “an excess of 20 percent of the voters flagged as “non-citizens” in Miami-Dade are, in fact, citizens.”  How can a state get its numbers so incredibly wrong? According to the article “Hispanic, democratic and independent-minded voters are the most likely to be targeted.”  Why do you think it is that Hispanic and democratic voters are more likely to be targeted than white people or republicans? Knowing there are so many errors in their lists I do not understand how things were ever allowed to get to this point.  I can only hope that the legal team in charge of fighting against this will prevail to prevent the injustice that could happen to many US citizens.