Odd those should be publicly posted like that. Usually people with those principles keep them hidden. The top one is a secret cult similar to Free Masons. The bottom one is from a Mississippi off shoot of the Ku Klux Klan. The three lightning bolts above them symbolized Nazi SS units during WWII.
Okay, I MADE ALL OF THAT UP.
The white-on-blue cross looks a square version of the Scottish flag, but doubt that's what it is. I notice the checkered one is also in front of the tire, but is rotated 90 degrees. Maybe they're something Goodyear uses to identify what tire compounds are on the car?