So why not preach peace, joy, and love? Well a lot people think that they can get people to become born again by preaching peace, joy, love, and comfort. But when your born again God expects you to be ready for whatever he wants you to do! Like when you join the army don't expect comfort! Because they expect you to fight! The same with God it will not always be easy to follow God. Satan will tempt you and people will mock you.
Sometimes you will have to step out of your comfort zone and stand up for the gospel! So when you try to get someone saved by preaching peace and comfort, they will become saved thinking that it will easy that they won't have to do anything, that they can do what they want to do as long as they still believe in God. That isn't right! If you do that your not saving people! Your giving them a ticket to hell!
I'm not saying that Jesus does not love you. He loves you more than anyone else! I am just saying that God wants you to be bold for the lord.