Solomon's pool, shields with the Emperor's insignia
These grievances are documented in Josephus:
from Antiquities, Bk 18, Ch. 3, Tr. William Whiston:
1. BUT now Pilate, the procurator of Judea, removed the army from Cesarea to Jerusalem, to take their winter quarters there, in order to abolish the Jewish laws. So he introduced Caesar's effigies, which were upon the ensigns, and brought them into the city; whereas our law forbids us the very making of images; on which account the former procurators were wont to make their entry into the city with such ensigns as had not those ornaments. Pilate was the first who brought those images to Jerusalem, and set them up there; which was done without the knowledge of the people, because it was done in the night time; but as soon as they knew it, they came in multitudes to Cesarea, and interceded with Pilate many days that he would remove the images; and when he would not grant their requests, because it would tend to the injury of Caesar, while yet they persevered in their request, on the sixth day he ordered his soldiers to have their weapons privately, while he came and sat upon his judgment-seat, which seat was so prepared in the open place of the city, that it concealed the army that lay ready to oppress them; and when the Jews petitioned him again, he gave a signal to the soldiers to encompass them routed, and threatened that their punishment should be no less than immediate death, unless they would leave off disturbing him, and go their ways home. But they threw themselves upon the ground, and laid their necks bare, and said they would take their death very willingly, rather than the wisdom of their laws should be transgressed; upon which Pilate was deeply affected with their firm resolution to keep their laws inviolable, and presently commanded the images to be carried back from Jerusalem to Cesarea.
2. But Pilate undertook to bring a current of water to Jerusalem, and did it with the sacred money, and derived the origin of the stream from the distance of two hundred furlongs. However, the Jews (8) were not pleased with what had been done about this water; and many ten thousands of the people got together, and made a clamor against him, and insisted that he should leave off that design. Some of them also used reproaches, and abused the man, as crowds of such people usually do. So he habited a great number of his soldiers in their habit, who carried daggers under their garments, and sent them to a place where they might surround them. So he bid the Jews himself go away; but they boldly casting reproaches upon him, he gave the soldiers that signal which had been beforehand agreed on; who laid upon them much greater blows than Pilate had commanded them, and equally punished those that were tumultuous, and those that were not; nor did they spare them in the least: and since the people were unarmed, and were caught by men prepared for what they were about, there were a great number of them slain by this means, and others of them ran away wounded. And thus an end was put to this sedition.
Almost the same story is told in the Josephus' Jewish War, Bk. 2, Ch. 9:
2. Now Pilate, who was sent as procurator into Judea by Tiberius, sent by night those images of Caesar that are called ensigns into Jerusalem. This excited a very among great tumult among the Jews when it was day; for those that were near them were astonished at the sight of them, as indications that their laws were trodden under foot; for those laws do not permit any sort of image to be brought into the city. Nay, besides the indignation which the citizens had themselves at this procedure, a vast number of people came running out of the country. These came zealously to Pilate to Cesarea, and besought him to carry those ensigns out of Jerusalem, and to preserve them their ancient laws inviolable; but upon Pilate's denial of their request, they fell (9) down prostrate upon the ground, and continued immovable in that posture for five days and as many nights. 3
. On the next day Pilate sat upon his tribunal, in the open market-place, and called to him the multitude, as desirous to give them an answer; and then gave a signal to the soldiers, that they should all by agreement at once encompass the Jews with their weapons; so the band of soldiers stood round about the Jews in three ranks. The Jews were under the utmost consternation at that unexpected sight. Pilate also said to them that they should be cut in pieces, unless they would admit of Caesar's images, and gave intimation to the soldiers to draw their naked swords. Hereupon the Jews, as it were at one signal, fell down in vast numbers together, and exposed their necks bare, and cried out that they were sooner ready to be slain, than that their law should be transgressed. Hereupon Pilate was greatly surprised at their prodigious superstition, and gave order that the ensigns should be presently carried out of Jerusalem.
4. After this he raised another disturbance, by expending that sacred treasure which is called Corban (10) upon aqueducts, whereby he brought water from the distance of four hundred furlongs. At this the multitude had indignation; and when Pilate was come to Jerusalem, they came about his tribunal, and made a clamor at it. Now when he was apprized aforehand of this disturbance, he mixed his own soldiers in their armor with the multitude, and ordered them to conceal themselves under the habits of private men, and not indeed to use their swords, but with their staves to beat those that made the clamor. He then gave the signal from his tribunal [to do as he had bidden them]. Now the Jews were so sadly beaten, that many of them perished by the stripes they received, and many of them perished as trodden to death by themselves; by which means the multitude was astonished at the calamity of those that were slain, and held their peace.
for the full translations see the Josephus Page
These grievances are also discussed in the Ecole Page on Pilate.