Ignoring for the moment how a marsupial got from Australasia to the near East, then back to Australasia after the flood (including the problems of no food and an ocean to cross), it then has to split into multiple groupings of immensely diverse creatures.
How the hell is it supposed to achieve all that? In a few thousand years?
Sounds to me like a miracle was needed.
What do we know about genetic diversity of marsupials?
Je suis Charlie. Je suis Ahmed. Je suis Juif. Je suis Parisien.
"Life, don't talk to me about life" - Marvin the Paranoid Android
"Science adjusts it's views based on what's observed. Faith is the denial of observation so that Belief can be preserved." - Tim Minchin, in his beat poem, Storm.