Czuch Chuckers: We (the US) has more people on this site than from any other country!

True.

When you have more than someone else you have a type of majority.

True, but only in the union of those two sets. That is, if you take all the players from France and the US together, the US players have a majority.

The percentage of players on this site from the US is higher (more) than from any other country!

Also true. That still doesn't mean the US players have the majority of the players on this site.

Proof: take a list of all player names. Take two pieces of paper, one labelled "US players", the other "Non-US players". Put all players from the US on the first page, every one else on the other. Count the names. Whoever has the highest count has the majority.