Clarification as to ACTUAL LDS beliefs--
God is 100% loving, merciful, and just. He gave unto us our ability to choose because He loves us. He also knew that people would mis-use this gift and do sinful wicked things, and separate themselves from Him. So He gave His Only Begotten Son, that whomsoever believes in Him can be washed cleaned of that sin, healed, and live forever with Him --- an astronomical gesture of mercy and love from God.
Now God is also completely just. Those people whom choose to sin and refuse to repent and come unto Him will be met with complete justice for their horrible actions. Those people whom are injured because of sins of others and come unto Him are healed, because of His mercy, justice, and love.