What is love?
But really, the original Terminator movie had a lame sci-fi backdrop in order to explain a simple thriller-action plot but, in order to make a franchise, subsequent movies focused on the sci-fi plot and its cartoon-like time travel element.
Terminator comes from the future to assassinate some one while someone else (terminator or not) comes from the future to save them (preventing future war optional as well as pointless). <--- All fucking three movies.
And anyone aware of the Grandfather Paradox is left wondering why take it seriously.
(I'm sure this post will earn me some neg rep)