Within about 20 years after Yeshua's death, "tens of thousands" of Jews were believeing Jews in Jerusalem alone. I read this is an excellent source and have been searching for that quote for almost two weeks now...

I can't find it, LOL, but I'll keep looking (muses... hm, maybe it was in Edersheim?)
AT any rate, the source cited Scripture showing that there were ten's of thousands of believing Jews in Jerusalem alone, already in a very short time after Yeshua's death. "Ten's of thousands" means at LEAST 20,000 in a city that didn't have an uncommonly huge population in the first place -- so this is a significant number of people -- perhaps 1/4 to 1/5 of the population at the time, I think it stated. Bear with me -- I am going by memory, but I have wanted to post this on a few threads many times.
MANY Jews did receive Yeshua -- but that is not what we are led to believe. (Someone correct me if I am wrong) It was after persecution of the Jews and anti-Jew laws which forced believing Jews to make a sad choice for survival -- the choice to no longer identify with/as Jews, which brought about then the knee-jerk decision of the non-believing Jews themselves at Yavneh to no longer tolerate believing Jews in the Synagogues -- it was then that Jew non-believer in Yeshua and Jew believer in Yeshua were split, divorced from one another and no longer fellowshipped, and it then appeared that "believing Jews" practically ceased to exist. But the common idea is that not many Jews received Yeshua. This is simply untrue. Not many of the RULING Jews received Yeshua -- THAT is true I think, and I think it is obvious why they did not... He was a threat to their status, and He exposed their hypocrisy (they themselves didn't do what they taught the people to do -- in a "do as I say, not as I do" sort of thing) and He taught things that went against the common Jewish
connotations.
But blanket statements such as "the Jews rejected Jesus" are first of all... false, and secondly... dangerous in that they lead to blanket judgments in the mind of the hearer.