Why Does Bush Make this Sign so Often?

Why does Bush make this sign so often if the sign is associated with a satanic sign?
Check the link to see the number of times he has made this sign.

Bush Devil Sign: "Bush says it's the Univ. of Texas
'Hook 'em Horns' sign.

The sign of Satan:
A clenched fist
with his index &
little fingers
sticking up." [source]

In case you didn't click the link yet, click here for an informative series of photos
The commentary is humorous but there is a tinge of the scary.