How did the emancipation proclamation turn the british public opinion against the south?

The Emancipation Proclamation helped prevent the involvement of foreign nations in the Civil War because most Europeans were against the institution of slavery.  Britain and France had considered supporting the Confederacy in order to expand their influence in the Western Hemisphere but failed to do so because the South supported slavery

arresting and exicuting citizens

was a long, primarily nonviolent series of events to bring full civil rights and equality under the law to all americans. the era has had a lasting impact on united states society, in its tactics, the increased social and legal acceptance of civil rights, and in its exposure of the prevalence and cost of racism. in the south violence and fraud in southern elections from 1868 to 1876, which had reduced black voter turnout and enabled southern white democrats to regain power in state legislatures across the south