Okay, I think I may understand. I guess the confusion comes in because I am not seeing the "SHOULD" part as it relates to obeying God's rules. To me, it reads more like a prediction or a description than it does a justification. It also doesn't seem very universal.
Let's say that someone, maybe a Buddhist or an atheist, chooses not to love Jesus. Are they then justified in being indifferent to God's laws?
Good question. I'll have to look for the verse, but there is Biblical backup for the idea that people will be judged on how they responded to what they could divine about God from His creation.