why not religionism ?

[Drich]

Racism is called "racism", but discrimination against a religion is called "xenophobia".
Why is it not called "religionism" ?

i'm sure someone has pointed this out already but just incase..

xenophobia

• n.
  A fear of strangers or foreigners.
  
  
• n.
  A strong antipathy or aversion to strangers or foreigners.
  
  
• n.
  a fear of foreigners or strangers
  

As you can see Xenophobia has nothing to do with religion but a fear of strange or foreign people. 
so why isn't religion called religionism meant as a identifier of hate? because religion is not intrinsically hateful. rather in some religions hate can be identified like xenophobia or even racism but the idea of all religion needs to be identified as a form of hate is not an intellectually honest assessment of all religion.