Why such tensions existed between Egyptians and the British?

Egypt came under attack from Italian Libya on account of the British presence there, although Egypt itself remained neutral until late in the war. After the war Egypt sought to modify the treaty, but it was abrogated in its entirety by an anti-British government in October 1951.

Explanation:

"the attempts of the proletariat to rise above this abasement"

the emancipation proclamation was the aim of the war change to include the freeing of slaves in addition to preserving the union. the 13th amendment, which abolished slavery in the u.s. was passed on december 6th 1865.

as promised, lincoln waited to unveil the proclamation until he could do so with success from the union military advance. on september 22nd 1862, after a victory at antietam, he publicly announced a preliminary emancipation proclamation, declaring all slaves free in the rebellious states as of january 1st 1863.