I love this question! I am on chapter 16 of an in-depth study of the book of Matthew, and for the first time am reading for myself, what Jesus ACTUALLY said. The whole book seems to be in direct opposition to the way JW's behave and teach. They are the modern day pharisees, with so many rules and judgments cast upon each other and people of the world, they don't know what they believe, except of course that Jesus is Jehovah's subordinate. They do not follow his commands, from what I have observed. I was never baptized, so maybe they are practicing some righteousness in secret, that we can not see... But their sheep's clothing is not covering the true nature of the society they serve with such vigor.
A few examples that have stood out to me:
"Take care not to practice your righteousness in front of men to be noticed by them, otherwise you will have no reward with your Father who is in the heavens." Matthew 6:1 (Why are JW's required to report every deed and hour they do in field service, to be recognized by their elders and maintain positions within the organization? If you were to practice your field service in secret, what would the response be from the men in the congregation?) "...so that your gifts of mercy may be in secret. Then your Father who looks on you in secret may repay you." Matthew 6:4
"Love one another, as I have loved you." (Unless they are not JW's, and even if they are, be wise who you associate with!) The parable of the Good Samaritan, is a stark contrast to how JW's act toward anyone who is not parroting the party line, and keeping themselves "in good standing," through their reporting requirements.
"Stop judging that you may not be judged." Matthew 7:1
"All things, therefore, that you want men to do to you, you also must do to them." Matthew 7:12
The JW's do not donate to charity, but spend all their time and efforts working to distribute Watchtower publications. When I asked my sister why do JW's not do as Jesus commanded, she replied: "That was just an example. What we do is more important than giving to a food bank or homeless shelter."
In fact, Jesus said in Matthew 25:31-46, in the parable of the sheep and goats:
41 "Then he will say to those on his left: Go away from me, you who have been cursed, into the everlasting fire prepared for the Devail and his angels. For I became hungry, but you gave me nothing to eat' and I was thirsty, but you gave me nothing to drink. I was a stranger, but you did not receive me hospitably' naked, but you did not clothe me; sick and in prison, but you did not look after me.' Then they too will answer with the words: "Lord, when did we see you hungry or thirsty or a stranger or naked or sick or in prison and did not minister to you?' Then he will answer them, saying, "Truly I say to you, to the extent that you did not do it to one of these least ones, you did not do it to me.'