I'm not necessarily defending the decision, I just don't see it as being something earth shattering like a lot of people are reacting to it. Also, I think the reasoning behind the decision isn't so grossly conceived to suggest some kind of conspiracy to take away anyone's rights.
What I understand is, during the civil rights era the Federal government was granted extraordinary powers over the individual states ability to conduct its own business, and the part of the voting rights act they struck down was one example of that. It was like extraordinary measures for extraordinary times, but it was also of questionable constitutionality. But just like how we see the government operating outside of the constitution in response to terrorism, when shyt gets very bad the political environment allows for it. People are majority willing to accept the government doing this during moments like that.
Now it seems to court is back pedaling and saying, OK we gave the federal unprecendented power over the state governments, and that was never really constitutional, so now that shyt has calmed down, lets give the states back their autonomy. If states begin to egregiously abuse voter rights, it will be interesting to see what happens next, but I don't think that will happen.
I expect the states to do some questionable things, more akin to trolling, and the media and politicians jumping up in arms like slavery is back.