I still don't get why Kylo Ren joined Snoke and wants to conquer the galaxy.

In the TLJ we discovered how Kylo has been betrayed by Luke and turned to the dark side. I know he felt betrayed by his master but why should he want to join Snoke and conquer the galaxy just because of it?There shouldn't be other motivations?It's a lack of background that I don't understand. And you what you think? via /r/StarWars https://ift.tt/2IwVCCQ