Cardinals- religious symbology by the oppressive Catholics, your bird isn't fooling anyone. also PETA
Falcons- "dirty" birds, aka that black is dirty, pretty dang racist
Ravens- BLACK bird
Bills-white mans almost extinction of this species
Panthers- black panthers
Bears, probably something to do with us destroying their home enviroment
Bengals- kept in cages, PETA
Browns- if redskins is offensive this should be too, plus its the Browns.
Cowboys- white boys running around doing whatever they want keeping animals in cages
Broncos- symbol in American (read white) folklore
Lions- trophy brought home, or kept in cage by the white man
Packers- white men working/job
Texans- you mean "what should be north mexico"
Colts- colts and their tie to American history/folklore = racist
Jaguars - south american symbol, probably a trophy a white man brought home
Chiefs - Native american
Chargers- electricity, white privledge
Rams - PETA
Dolphins - See the Chappelle show, flipper is racist, probably an homage to flipper
Vikings - violent white person
Patriots - violent white person
Saints - religion
Giants - midgets
Jets - 9/11
Raiders - violent white people
Eagles - Symbol of America, America is mostly white, therefore racist like our Flag
Steelers - celebrates a time period of predominately white men working jobs
49ers - destroy the enviroment
Seahawks - PETA
Buccaneers - violent white people being celebrated
Titans - based on mythology, religious.
Redskins -easy, skin color