I have been a believer for going on forty-five years and I have met a lot of people on the path of righteousness. Over the years I have learned that if I'm going to love a brother or a sister, I would need to overlook a lot of discrepancies. And I am sure some brothers and sisters have felt the same way about me.
Romans 16:17 I urge you my friends: watch out for those who cause divisions and upset people's faith and go against the teaching which you have received. Keep away from them.
It seems good to me and the Holy Ghost that some brothers and sisters can never be friends. Some people just have a different way of serving God than others do. Separating yourself from the brethren should not be motivated by hate. Separation can be a good thing if it is implemented to avoid strife and division. Abraham separated from his nephew Lot in order to avoid strife, Abraham did not agree with Lot but he loved him.
We can love others and not be friends.
Some brethren have some ideas and convictions that might not be what you believe. It's ok to disagree but do not become disagreeable. It seems like some brethren look for things that they can argue about, they seem to be programmed to quarrel. We should focus on the things that unite us, not on things that divide us. I have had profound disagreements with the brethren and they walked away mad at me for what I believed. These holy brethren are my brothers and sisters but they are not my friends.
Proverbs 22:24 Don't make friends with people who have hot, violent tempers. You might gain their habits and not be able to change.
Some believers have bad tempers and they demand every one around them to come in line with their every whim. Proverbs warned us to be watchful who we hang out with, we could act just like our weird friends. The Apostle Paul praised some brethren because they were following after his example of faithfulness. He did not command the brothers to follow him, he invited them but they had to choose. Christ suffered for us, leaving us an example that we should follow His steps. Jesus loved everyone but He did not allow those in error to correct Him. He confronted them with the truth and for this they wanted to kill Him. I have had people leave the church because they did not agree with the vision, but then they started lies about me and tried to discredit me. These were brothers and sisters but not friends, they unwittingly aligned themselves with the devil. Peter aligned himself with the devil when he told Jesus not to be crucified, Jesus rebuked him and he went on to be an example of faith.
Ephesians 5:11 Have nothing to do with the worthless things that people do, things that belong to the darkness. Instead bring them out to the light.
The brethren are not sinners, but sometimes they do things that sinners do. The Bible warns us to avoid them. Some things we can overlook, but other things can be a deal breaker and we must confront them if we have any hope of fellowship. Some Christians don't act like Christians, you can't tell who they are on account of their fruit. The key to harmony is putting the needs of others before your own needs. Needy people can be difficult to get along with, they always want something from someone but they never give anything to help others. Loving people means you put them first, if you will do this then people will put you first.