Finally with some easy steps you can make villagers DEFEND themselves 1.9 working.
Here is how:

 

AWESOME itll be so much more interesting now :p.

 

Are you sure this works..?

 

Hmm... Does this really work? *Unconvinced*

 

Thx

test it out yourself!

even try it in 1.9 just put thorns 3 armor in a dispenser and put a button and test it it works