Oh Caleb, you're really full of bung and quoting from the Jewish Encyclopedia isn't going to get me to believe anything you're selling.
The term RAQIYA means to spread over like if you whirl a pizza pie dough over your head and you don't catch it going down and you end up wearing it as a hat, it is "spread over" you, now imagine I come along and smack down on it a few times so it is firmly attached to your head.
This lessons on Jewish belief are also "over" you, I'm afraid.
The Greek stereoma (LXX) and the Latin firmamentum (Vulgata) mean firm, stable, constant thing.
Judaism has had so many different sects that who's to say what the belief of one sect or another is correct. Was Paul not a Jew? Was he not taught about Torah from the best?
And there were the Essenes, and the Saducees, the Pharisees, the Zealots, and whoever else cared to interpret the Torah. The Talmud is just that, arguments about interpretations and traditions.
And today there are quite a few different sects of Judaism not agreeing one with another about traditions and interpretations.
I find it quite ridiculous that you start badmouthing Christian belief as pagan! I guess you're siding with the Pharisees and the Priests in calling Jesus a blasphemer. Then, like them, you're just exposing yourself as a hypocrite.