Brother Jonathan is right in bringing this topic up. We are living in a day when the Gospel has been "upstaged" by "other" things. It is not that disproving things are wrong, but it is that it is not "right"
Sometimes the question is not "is it wrong" but "is it the best things?"
If a person has not heard the Gospel how will disproving a false doctrine sound to them? If a person is distant from God do they have what it takes to understand why wrong doctrines are wrong? It would seem like a waste of time.
No Apostle ever used the argument that God loves people in order to save them, just look it up. They always preached Christ and then when the people responded and believed the Gospel, then they were able to properly understand God's love.
There is a right way )and a wrong way) to present Christ. The Apostle Paul said that we preach Christ "crucified" that is to say, "having died to save us from our sins" this may not be popular to bring up sin, but unless Christ is presented as He is "the sin bearer" men will be continent to remain in their sinful condition. If men present Christ as "loving" people just the way they are (in their sin) what possible motive could there be for leaving sin?
This is not the way that God has represented the case. Men must "repent" in order to be saved. They must want to change before they are given grace to repent. John the baptist said that men should bring forth "fruit" unto repentance which implies that they know that they have offended God and can see that they need to change. God has provided the means to change in the person of Christ Jesus, but it is only as we are associated with Him in His death that we are also associated with Him in His Life!

In Christ,
Robert Cobb