lethargic_man | Antiquities of the Jews, fit the thirtieth

The Jews, it appears, did not want (XIV.3.41) to be ruled by kings:

There it was that he heard the causes of the Jews, and of their governors Hyrcanus and Aristobulus, who were at difference one with another, as also of the nation against them both, which did not desire to be under kingly' government, because the form of government they received from their forefathers was that of subjection to the priests of that God whom they worshipped; and [they complained], that though these two were the posterity of priests, yet did they seek to change the government of their nation to another form, in order to enslave them.

More information on to what extent one could break Shabbos in national self-defence, referring to Pompey's erection of a bank of earth to install siege engines on (XIV.4.63):

And had it not been our practice, from the days of our forefathers, to rest on the seventh day, this bank could never have been perfected, by reason of the opposition the Jews would have made; for though our law gives us leave then to defend ourselves against those that begin to fight with us and assault us, yet does it not permit us to meddle with our enemies while they do any thing else. Which thing when the Romans understood, on those days which we call Sabbaths they threw nothing at the Jews, nor came to any pitched battle with them; but raised up their earthen banks, and brought their engines into such forwardness, that they might do execution the next day.

The passage continues by telling us how the priests would rather die than not carry out the sacrifices:

And any one may hence learn how very great piety we exercise towards God, and the observance of his laws, since the priests were not at all hindered from their sacred ministrations by their fear during this siege, but did still twice a-day, in the morning and about the ninth hour, offer their sacrifices on the altar; nor did they omit those sacrifices, if any melancholy accident happened by the stones that were thrown among them; for although the city was taken on the third month, on the day of the fast, upon the hundred and seventy-ninth olympiad, when Caius Antonius and Marcus Tullius Cicero were consuls, and the enemy then fell upon them, and cut the throats of those that were in the temple; yet could not those that offered the sacrifices be compelled to run away, neither by the fear they were in of their own lives, nor by the number that were already slain, as thinking it better to suffer whatever came upon them, at their very altars, than to omit any thing that their laws required of them. And that this is not a mere brag, or an encomium to manifest a degree of our piety that was false, but is the real truth, I appeal to those that have written of the acts of Pompey; and, among them, to Strabo and Nicolaus [of Damascus]; and besides these two, Titus Livius, the writer of the Roman History, who will bear witness to this thing.

Pompey is infamous in Jewish history for entering the Holy of Holies, where according to Jewish law only the High Priest may set foot, and even then only once a year, on Yom Kippur.

What's not so well known is what happened next (XIV.4.72):

There were in that temple the golden table, the holy candlestick, and the pouring vessels, and a great quantity of spices; and besides these there were among the treasures two thousand talents of sacred money: yet did Pompey touch nothing of all this, on account of his regard to religion; and in this point also he acted in a manner that was worthy of his virtue. The next day he gave order to those that had the charge of the temple to cleanse it, and to bring what offerings the law required to God; and restored the high priesthood to Hyrcanus

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Josephus notes