Never attribute to malice that which is adequately explained by stupidity.
There is an adage that reads “never attribute to malice that which can be adequately explained by stupidity... but don’t rule out malice.” This is known as Heinlein’s or Hanlon’s Razor (there is only a slight difference between the two). Unfortunately many people only go by the first part of Heinlein’s Razor, leaving out the “but don’t rule out malice” part...