There are certainly examples of tense relationships in the New Testament: Jesus and the religious leaders; Paul and John Mark; John the Baptist and Herod. Throughout the 1st Century church there existed strained relationships and dislike between two parties holding different points of view. But do all people who would say "I just don't like them." find themselves in the wrong? Similar to fear or wealth, personal preferences are not in themselves evil but rather can become doors to improper actions or words.
Personally speaking, there are a few things I do not like. Pimento cheese for instance (and saying I "do not like" pimento cheese is putting it mildly)...or drive-thru windows of any sort...or the Miami Heat organization as a whole. Its just a preference and is in itself neither good nor bad. However, it can lead to wrong actions. Yelling at my wife because she made pimento cheese or throwing a rock through the drive thru window or getting some sort of perverted thrill as Wade heads to the locker room with a 2nd quarter hip injury. These are wrong.
And here is the point. When it comes to people, whether we like them or not is hardly the issue. What matters is whether we "love" them or not. Now when I say "love" them, I do not mean feeling affection toward them. What I mean is doing everything we can to help them make much of Jesus? And this is where dislike can become a hindrance. You do not have to like people, but you do have to love them. This is Jesus' commandment to us (Jn 15:12). If we like someone, then loving them seems so easy. Where dislike exists, loving becomes much more difficult...but the commandment remains.
More to come...