God destroyed Sodom because the people were evil, fine. Were the babies evil too? Not seeing much from God love there.Noah is an interesting case. He knew a flood was coming, and he was building a big boat. Why didn't he send word to his neighbors? Or did he? We don't know. Another thought: When Abraham learned Sodom was going to be destroyed, he asked God not to do it if there were some good men. On the other hand, he did not go and warn the city.Seems like a case of do as I say not as I do. The residents of Canaan or the victims of Noah's flood might question the whole "loving one's fellowman" thing.
On the other hand, we know from history that people choose to live near volcanoes, on earthquake faults, and places known to be prone to floods. They are warned of the dangers--and shrug them off. Was it the same in Biblical times, where people knew they were in some danger, but simply shrugged it off?
Noah and Lot are both examples of people who took warnings to heart. They survived. And upon surviving, both immediately got drunk. Survivor's guilt? Wondering if they could have done more? Couldn't face the prospect of starting over from scratch?