Is Romeo and Juliet more about hate than it is about love? Why?

You can certainly argue that the play is more about hate than love.  After all, it is hate that drives much of the action in the play.

Of course, Romeo and Juliet's love for each other is a big part of the play and it gives some of the more famous moments, like the balcony scene.

Even so, it wouldn't be much of a story without hate.  It is the hatred between the two families that makes them have to hide their love.  It's the hatred that makes Friar Lawrence have to devise his crazy plan that ends up getting Romeo and Juliet killed.  Finally, it's talk of hatred and its consequences that ends the play.

So, you can argue that the play is about hate because it really explores the consequences of hate more than it explores love.