I think the intention of that meme is to show how most people will support the underdog
agree with gizzmo.
Croatia is not an underdog.
If I was a "bet-man" I wouldn't give more than 55-45%, 60-40% max.

I don't care who will win the WC but imo most of the people would like that Croatia beats the powerful France.
most of the neutral football fans would love to see a final between France and England
but ...