It is a matter of personal opinion but if you believe that violence is an appropriate response of being wronged in some way then yes they were justified.
IT IS D THE LONE STAR REPUBLIC!
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The passage of the Black Codes in many southern states enraged both northerners and African Americans across the country. In response, Congress passed the Civil Rights Act over president Andrew Johnson's veto as well as the Reconstruction Act of 1867. These acts effectively outlawed discrimination on basis of race and granted equal rights to all under the Constitution. They also guaranteed that a citizen's right to vote could not be denied "on account of race, color, or previous condition of servitude." All of these actions effectively invalidated the Black Codes. However, the road to reconstruction was still a long and rocky one.
After the victory in the battle over his rival for the Roman throne, Emperor Constantine took the necessary steps for convening and assembling the Milan Edict in 313 years. According to this edict, Christianity has become an equal religion with all the existing official religions of the Roman Empire. The persecution of Christians ceased and thus ended the era of early Christianity. Shortly thereafter in Nicaea in 326, the First Ecumenical Council was held on the topic of formalization of Biblical gospels, scriptures and beliefs, thus establishing the official New Testament.
The answer is: D.