The fraud argument is dubious, at best, and is a rather transparent cover for the real purpose, which is to reduce Democratic votes. The claims of voter fraud based on these items is extremely low, as in tiny, tiny fractions of a percent. Not nearly enough to justify the measures, and certainly nowhere near enough to warrant the expense they cause.
The simple fact is, it is the GOP that proposes and passes such measures, and they do it for political gain. When the GOP takes over a state legislature or governorship, these proposals soon follow.
The NAACP and other minority advocacy groups feel targeted by these proposals because the numbers don't lie and show that it is their constituency which is negatively affected the most, by far.
As I say, I think it has less to do with race, and much more to do with the GOP simply trying to manage the numbers game and to weaken turnout by traditionally Democratic voters.