Nephilim Returns - These Are The Days of Noah

Why did God kill everyone on earth except Noah and 7 of his family?  What do the fallen angels (son of God) have to do with it? Could the fallen angels be up to something similar today?

Watch this new 20 minute video here;  https://magamedia.org/nephilim-returns-these-are-the-days-of-noah-video/

As it was in the Days of Noah, so shall it be at the coming (return) of the Son of Man. - Jesus