Martin Luther: "Therefore know, my dear Christian, that next to the Devil you have no more bitter, more poisonous, more vehement an enemy than a real Jew who earnestly desires to be a Jew. There may be some among them who believe what the cow or the goose believes. But all of them are surrounded with their blood and circumcision. In history, therefore, they are often accused of poisoning wells, stealing children and mutilating them; as in Trent, Weiszensee, etc."
Church Historian Eusebius of Caesarea: "Jews in every community crucified a Christian at their Purim festival as a rejection of Jesus."
Church Historian Socrates of Constantinople: "Soon afterwards the Jews renewed their malevolent and impious practices against the Christians, and drew down upon themselves deserved punishment. At a place named Inmestar, situated between Chalcis and Antioch in Syria, the Jews were amusing themselves in their usual way with a variety of sports. In this way they indulged in many absurdities, and at length impelled by drunkenness they were guilty of scoffing at Christians and even Christ himself; and in derision of the cross and those who put their trust in the Crucified One, they seized a Christian boy, and having bound him to a cross, began to laugh and sneer at him. But in a little while becoming so transported with fury, they scourged the child until he died under their hands. This conduct occasioned a sharp conflict between them and the Christians; and as soon as the emperors were informed of the circumstance, they issued orders to the governor of the province to find out and punish the delinquents. And thus the Jewish inhabitants of this place paid the penalty for the wickedness they had committed in their impious sport."
Historian Cassius Dio: "Meanwhile the Jews in the region of Cyrene had put a certain Andreas at their head, and were destroying both the Romans and the Greeks. They would eat the flesh of their victims, make belts for themselves of their entrails, anoint themselves with their blood and wear their skins for clothing; many they sawed in two, from the head downwards; others they gave to wild beasts, and still others they forced to fight as gladiators. In all 220,000 persons perished. In Egypt, too, they perpetrated many similar outrages, and in Cyprus, under the leadership of a certain Artemion. There, also, 240,000 perished, and for this reason no Jew may set foot on that island, but even if one of them is driven upon its shores by a storm he is put to death."
Theologian Thomas of Cantimpré: "It is quite certain that the Jews of every province annually decide by lot which congregation or city is to send Christian blood to the other congregations."
The Bible in Jeremiah 32: "30 For the children of Israel and the children of Judah have only done evil before me from their youth: for the children of Israel have only provoked me to anger with the work of their hands, saith the Lord. 35 And they built the high places of Baal, which are in the valley of the son of Hinnom, to cause their sons and their daughters to pass through the fire unto Molech; which I commanded them not, neither came it into my mind, that they should do this abomination, to cause Judah to sin."
Source for Luther: https://en.wikisource.org/wiki/The_Jews_and_Their_Lies
Source for Eusebius: https://www.jpost.com/blogs/the-jewish-problem---from-anti-judaism-to-anti-semitism/the-jewish-problem-adversus-judeaos-against-the-jews-376333
Source for Socrates: https://www.newadvent.org/fathers/26017.htm
Source for Cassius Dio: https://www.loebclassics.com/view/dio_cassius-roman_history/1914/pb_LCL176.421.xml
Source for Thomas: Bonum Universale de Apibus ii. 29, § 23
Suddenly the 20th century makes a lot more sense.
I believe March 24 is Saint Simon of Trent Day.
Many pictures depict him as the little boy who was drained of blood by a dozen Rabbis.
OP is an uncritical quote miner. The purported Eusebius quote is not in any way his but was, in his own JPost source, attributed to Eusebius rather than put in quotation marks. This one goes back to a very credulous, imbalanced Dagobert Runes, Jew and the Cross, 1965, who in the same breath makes the mistake of converting Eusebius's 90,000 Jewish captives during the Jewish war sold to Romans for their labor, to 90,000 Christian captives during the Persian war sold to Jews for sport killing. With that much misreading it's probable that the summary about Purim was a false memory of the actual quote, separately given here, from Socrates of Constantinople, 5th century. There simply was and is no evidence of widespread simultaneous annual crucifixions in the 4th century by anybody.
Of course nobody else reported any evidence of Socrates's rumor, except if you trace the rumor a warping of generic pagan blood libels against the Jews (Damocritus in the 10th-century Suda, and Apion in Josephus, who credits Posidonius and Apollonius Molo as influencers). But the pagans would have adapted it from the original blood libel against the Christians, who would have received it because obeying Jesus's words exposed them to the charge.
In other words it appears nobody thought of inventing the blood libel until Jesus took it upon himself to talk like a cannibal, didactically, for the purpose of weeding out the skeptics. But by doing this he also set up the deeper layer: he took upon himself all the blame for cannibalism that everyone else laid against any other person, innocent or guilty; he made himself the chief of cannibals so that he could save whoever wanted to be saved. That's an incredible confirm of his mission.