This might be a hard answer I'm about to give but I must be honest with you. If someone is practicing wickedness and heinous evil in rebellion against god is it not right to stop it? The truth is we don't know what sort of wickedness was done back then but it must have been egregious enough for god to command those people be destroyed. Same thing with the great flood. The enemy does not want you to think that god is just but rather he's a tyrant that orders the death of innocents when in reality it is that old serpent himself that wants people dead and leads people astray.
I know it's a hard concept to accept and I can totally understand why so many reject god in the first place. I'll just repeat what I've said before to others here...keep asking questions and keep searching.
First off:
replies tend to come across as patronizing, as though I'm being talked down to. That's not appreciated.
If someone is practicing wickedness and heinous evil in rebellion against god is it not right to stop it?
Why? Different people have different concepts of god/gods/goddess(es) and what is good, right, and moral and what is evil, wrong, and immoral. What is seen as "rebellion against god" may be nothing more than people simply going about their daily lives according to THEIR god's wishes and are therefore not in rebellion to the god(s) THEY worship.
To put it in less abstract form: There are people who sincerely think that people like me (atheists) are evil and "in rebellion against god". Should they have the right to consider that I've committed "wickedness and heinous evil" and have the right to kill me?
Please don't pooh-pooh that. There really are people who are that deluded, who think that anyone who doesn't believe as they do deserves to die.
You've been around the forum a long time - did you ever read any posts by someone named Domination3000? One of his common themes was "women who have abortions should be executed." He didn't let up on that until I pointed out that he could potentially be advocating the execution of one or more female CFC members (dunno if any female members here have had an abortion and never asked; it's not my business, but it remains a possibility).
I'm not convinced the flood ever happened. A smaller-scale local flood is not impossible, of course, and to the people of that time and place who were unaware of how big the world really is, it may have seemed as though the whole world was flooded. But the flood story is predated by a much earlier flood story (aka Gilgamesh). And the preponderance in the bible of "40 days/40 nights" and Moses et. al wandering for 40 years... 40 seems to be a popular number, doesn't it?
Gotta ask how the Antarctic penguins got on the ark and somehow survived. The Middle East is far outside their normal habitat, both in terms of temperature, and available food. And why would they go there, anyway? Or did they just sit by the ocean on an ice shelf and wait for Noah to come pick them up?