The two men didn’t tell Lot what they were about to do, they waited to see what was going to happen, to see if the outcry of Sodom and Gomorrah was indeed great, and their sin was exceedingly grave as God had said, now these two men from God wanted to see it and report to God.
Then many from the sinful city of Sodom surrounded Lot’s house and try to break in to have sex with the two men and probably kill them. The men of Sodom were governed by their senses completely they were in the hands of the devil; they wanted to have their will with the two men that probably looked hansom and tempting to the sinful crowd.
Lot offered them his daughters, they would probably have killed them too, and this shows us the value of the women at the time of Lot and Abraham. Now the men had seen enough, now God knew that what the outcry from Sodom had told Him was true, the moment for action had come. They grabbed Lot and blinded the crowd.