>Who were they, ethnically?
They were not part of any known related ethnicity, as they reproduced by having males fucking each other in the ass. That's why Kocek's, the male equivalent to belly dancers, were far more popular than the female.
en.wikipedia.org/wiki/Köçek
>The köçek (plural köçekler in Turkish) was typically a very handsome young male rakkas, or dancer, who usually cross-dressed in feminine attire, and was employed as an entertainer.
>Famous poets, such as Fazyl bin Tahir Enderuni, wrote poems, and classical composers, such as the court musician Hammamizade İsmail Dede Efendi (1778–1846), composed köçekces for celebrated köçeks. Many Istanbul meyhanes (nighttime taverns serving meze, raki or wine) hired köçeks. Before starting their performance, the köçek danced among the spectators, to make them more excited. In the audience, competition for their attention often caused commotions and altercations. Men would go wild, breaking their glasses, shouting themselves voiceless, or fighting and sometimes killing each other vying for the boys' sexual favors
>Köçeks were much more sought after than the Çengi ("belly dancers"), their female counterparts. Some youths were known to have been killed by the Çengi, who were extremely jealous of men's attention toward the boys.
>What was their religion?
Ayullawullulllahullulah!
>Who came before them?
The Byzantine Empire
>Who came after?
Modern Turkish "people"
>Whose ass did they kick?
Mostly each others. They spent a lot of time shoving all sorts of things up each other's asses.
>Who kicked their ass?
Lots of people, but the Turks liked it.
>Did the islamic empire come before or after?
>What about the Turkish empire? How did it relate to them?
I'm not even sure what these two mean.