Agape love? Hyper-grace? Biblical or dangerous?

Can true believers still struggle with fear? How do God's love and God's grace relate to each other? Why does everyone seem to agree about love but then divide over grace? Is the teaching about abiding in John 15 really about losing salvation? Why does Romans say the gifts and the calling of God are "without repentance"? This gospel is so incredible! I just want my friends to get it, and it's frustrating when they don't!