Being kind and loving in a biblical sense is doing what is necessary, even if painful for one or both parties.
Ask any field medic, EMT, soldier, fireman, LE Officer, even ask yourself. You know this to be true.
Warning people about their eternal destiny in Hell and pleading with them to turn from they're sin to Christ as their only hope for salvation, is ALWAYS KIND AND LOVING.
Please friends, let us all purpose in or hearts to share the gospel with those God places in our path. If at all possible be soft in speech. Yet, always remember the gospel is a hard truth that must be shared if we ever hope for people to be saved.
No sane person, yanked from sleep out of their bed in the midst out a burning house, would ever turn on the fireman who saved them, complaining that they were rudely woken up from sleep and jostled about in an unloving or unkind way.
Remember the words of scripture. Go into the highways and byways and COMPEL them to come in. and, Snatch them from the flames!
God bless you as you reach out to the lost even when it hurts!