Protection of election integrity or discrimination?

http://www.nytimes.com/2014/10/19/us/supreme-court-upholds-texas-voter-id-law.html?_r=0

On October 18th, the Supreme Court ruled that Texas could use its stricter voter ID laws for the November elections. These ID laws state that in order to vote, citizens must present a photo ID. While that doesn't seem too bad, opponents of the ruling state that the court's action could deny the right to vote to hundreds of thousands of otherwise eligible voters. Opponents also argue that a disproportionate number of these voters who will be barred from voting by the new law are African American or Hispanic. The process for obtaining a Texas state issued ID is also difficult as travel times to agencies issuing IDs can be upwards of 3 hours for some people.

I honestly don't know what to think about this. It seems ridiculous that racial discrimination at the polls could still be a thing, and one has to wonder why these hundreds of thousands of voters don't have photo IDs (Don't they drive? Don't they at least have a gun license or a passport lying around? Do they only have unacceptable forms of ID such as student IDs or tribal IDs? Surely they have something.) However, I can kind of see where the opponents of this ruling are coming from. I don't know anything about where these voters are coming from, and if I were in their position I'd be really ticked off if I couldn't vote just because I didn't have an ID. But at the same time, I can see how the use of IDs would prevent illegal aliens and resident aliens from voting, which is something we definitely don't want. It's a complicated issue.