Definitions of uncritical:

• adjective:   not critical; not tending to find or call attention to errors

  Example: "A devoted and almost uncritical admirer"

• adjective:   marked by disregard for critical standards or procedures

  Example: "News sources reflected uncritical estimates of the number of juvenile addicts"

• adjective:   lacking in discrimination

  Example: "She was absolutely uncritical, she believed everything"