How long did the Muslims control the coffee trade and what was the name of the port that was used to export co?

[cp_scipiom]

they are not "instrumental" for anything- except the refinement of warfare

before the muslim invasion of Syria and Egypt Europe had access to coffee and the Silk road (trade to India and China). Trade was booming. Silk was imported from China by the ton (very common clothing in Byzantium for example)

Point being that the muslim invasions made the east-west interaction far more difficult. NOT easier.

we praise the arabs for a few inventions- like arabic numerals. They also kept a number of ancient written texts. OTOH they destroyed the Alexandria library and exterminated whole civilisations (for example the black Numidian tribes who used to inhabit Libya/Tunisia/Algeria)

In most cases their only contribution was destruction. They cut and monopolised the Silk Road- de facto destroying it (until Vasco da Gama re-established the connection by the round-Africa route) They murdered and enslaved milions of Europeans, Asians and over 95% of Africans.

Having one Avicenna does not quite compensate for that. My opinion of course.