Were there any Jews/Hebrews present during the First Council of Nicea?
What’s interesting about the various councils is that by the time of Constantine, there were hundreds and hundreds of movements all identifying themselves as “Christian”. (Remember “Christ” was not a name, it simply meant “Anointed.”) And none of the separate religious movements agreed on what Christianity was, who Jesus was, what Jesus was, or whether he even existed at all. So Constantine, who had allied himself with the Christianity as part of a power play struggle, convened a council to decide once and for all what Christianity was and wasn’t. The council was not peaceful. There were fights, arguments, dirty deals done under the table, but eventually a majority voted Contemporary Christianity into existence. Those “Christian” sects which did not adhere to the new established guidelines were systematically killed, and their religious books burned. And that’s how it happened, 2,000 years ago today.