Is possible to change town for a football team?

I state of being European and having lived for a year, in 1979 the United States. At the time the Colts were in Baltimore. Now I discover that you will be transferred to Indianapolis. How is it that you can move a team from one city to another without popular uprisings, riots and accidents? In Europe, a football team move from one city to an other could causes a state of war. One last question. Why Football is so named as it is played mainly with your hands? Sorry for my English. And Go Steelers!