What circumstances existing within the Roman Empire and/or Judaism allowed for the flourishing of Christianity?

What circumstances existing within the Roman Empire and/or Judaism allowed for the flourishing of Christianity?

Rome, being one of the super powers of that time was in control of the birth of christianity. Rome did not have any problems with Jews if they payed their taxes and contributed to society. However, Romans did not believe in the religion of the Jewish people which if why judaism did not flourish as much as much as Christianity did. After Jesus died and christianity flourished Rome incorporated and accepted Christianity the Jewish people were looked down upon more than they were and as the Romans in Judea spread the ideas of christianity, the rest of the Roman empire started to use it.