John Gill Commentary Judges 2:4

"And it came to pass, when the angel of Jehovah spake these words unto all the children of Israel, that the people lifted up their voice, and wept." — Judges 2:4 (ASV)

And it came to pass, when the angel of the Lord spoke these
words to all the children of Israel
This being either one of the three solemn feasts, when all the males appeared at the tabernacle of the Lord; or else here was now a solemn convention of all the tribes to inquire of the Lord the reason why they were not able to drive out the Canaanites in some places, and why they prevailed over them in many:

that the people lift up their voice, and wept ;
being affected with what the angel said, and convicted in their consciences of their sins, and so fearing the bad consequences of which, they wept because of the sins they had been guilty of, and because of the evils that were like to befall them on account of them.