Good is what God loves, and evil is what he hates. The world tolerates evil because it loves evil. Those who love God are like him, and are intolerant of evil. Tolerance as currently understood is pacificism towards evil. We are to be peacemakers, proclaiming God’s grace to man through His son Jesus. There is no peace without righteousness however.
Tolerance opposes good because it allows evil free reign to flourish. Those who tolerate evil become its agents. Tolerance in the world is bad enough, but those who call themselves christian also now tolerate what their Lord does not. We of the church must be for good, tolerance for abortion, corruption, drug use, false doctrine, and homosexuality is intolerance to the word of God. Dismissing the word treats scripture as common rather than divinely written.
The church is not the world, the light is in us, and we must proclaim the light and stand by it. Tolerance for darkness shrouds us and hides the light.