What is racist in these two sentences?

Blacks are known to be musical and strut and stride with great energy while marching and especially in New Orleans funerals. I’ve seen black men walking in the South African country side, frequently all of a sudden, jive a few steps, then resume their normal stroll.

As to stealing chickens, that was done by white soldiers with abandon. Note this from Vicksburg.

07 02 1863 [Thursday]

The wallpaper series reached a climax a few days later on July 2 just before the capitulation of the city. In that edition, articles accused townspeople of hoarding food, belittled Confederate soldiers for stealing vegetables and chickens, and congratulated a Mr. Kiser for sharing his corn crop with neighbors. Editor Swords reported that, out of dire hunger, tasted mule meat and related that it wasnot so bad. Another article reported the murder of a cat and stated that "poor, defunct Thomas was then prepared, not for the grave, but the pot, and several friends invited to partake of a nice rabbit". Swords teasingly invited General Grant to dine in Vicksburg.