If you believe Christ's teachings - " Continue to love YOUR enemies and to pray for those persecuting YOU"; "Love your neighbour as yourself". ( Matt. 5:44; 19:19) - then you will do your honest-hearted best to enlighten those who trudge up to your door. Share a wonderful Bible truth with them - something which they've never been able to see through the Watchtower veil. There are plenty to be found on this site.
Just don't hit them over the head with it - you are trying to help them see what you have found to be true!
Ask them a question about the Bible teaching you are showing them - don't make a statement about it. Let their minds try and reason on what you have asked. Only then is there any hope that they will start to analyze what they thought they believed was true.
For example;
Romans 6:7 - Why do you believe that this is literal? That means Christ's sacrifice was unnecessary, because our own death wipes out our sins.
Revelation 20:1-7, 12 - Why do you believe it says "new" scrolls, and why do you believe they are opened during Christ's 1000 reign? In actual fact, they are not new and the scrolls mentioned don't get opened until after Satan is destroyed.
Deuteronomy 29:10-15 - Why do you believe that foreigners were not included in the Law Covenant? These verses say the opposite.
Galatians 2:1-10 - Why do you believe that a 'Governing Body' resolved the circumcision debate? Verse 2 shows that Paul was directed by God/Christ to go to Jerusalem where the spies had come from, and tell those in Jerusalem the truth, not the other way round. They taught him nothing! (Verse 6)
Simple Bible truths which are perverted by the Org.