Tolerance of sin isn't showing love. It's a failure to warn others that participating in sinful behavior can cause you to lose your soul. I know you don't take the New Testament in its entirety, but we are told that if a Christian refuses to give up a sin then he is to be shunned. That's a far cry from tippy toeing around what others do. We all sin, but there's a difference between falling short and continuing to live in sin. For example if a married man is having an affair and refuses to stop. It brings reproach on the Lord's Church. He's given the opportunity to stop but if he refuses then he's to be shunned.