If you have foot fetishism is it normal?

No. The term fetishism indicates that it is not normal.
Fetish. Fetishism is an abnormal response to sexual interaction and it can have a negative impact on a relationship. " a true fetishist cannot have a satisfying sexual experience without it, and it's a problem, often interfering with real intimacy and sometimes resulting in destructive behavior." http://health.Howstuffworks.Com/sexual-health/sexuality/5-most-common-fetishes.Htm.