The best of the best were the Pharisees, but Jesus called them vipers. Their name was synonymous with the serpent's!
The modern church is a type of Tree of the Knowledge of Good and Evil. It professes to teach what Christ taught, but practices the deceit of the serpent.
Not even in apostolic days was the church pure. Gnosticism (those who professed secret knowledge and had a false Christ) were as popular as was the true Church. Little has changed!
2 Thessalonians 2:3 "Let no man deceive you by any means: for that day shall not come, except there come a falling away first..."
2 Peter 2:1 "But there were false prophets also among the people, even as there shall be false teachers among you, who privily shall bring in damnable heresies, even denying the Lord that bought them, and bring upon themselves swift destruction."
If you are a member of a church and have not been born again, you are part of the false church. If you attend a church which condones sin, you are part of the false church. If your church was once godly and righteous, chances are that it has went the way of the world!
It's the church's attempt to serve two masters:
Luke 16:13a "No servant can serve two masters: for either he will hate the one, and love the other; or else he will hold to the one, and despise the other."
The modern church serves two masters: in profession, it's Jesus Christ, but in practice, it's false knowledge. Knowledge is false because the doctrine of deceit is a lie. For instance, teaching that love is being tolerant of sin is false doctrine. The entire Bible is about "loving the sinner, but hating sin". The church should be holy ground and sin, except to be cleansed, has no place on holy ground.
Christians who are pro-abortion (the liar calls it "pro-choice") are deceived. Christians who are tolerant of or favor same-sex marriage are deceived. Whoever practices sin or coexists with those in the flesh are false Christians. If they profess his name, but fail to do God's will and trust his truth, God never knew them!
There are Christians in false churches. If they are there and are comfortable with false teaching they are in danger. For instance I left the Methodist Church when they united. Time has proved this to be a good decision because the national organization is on the wrong track with their social policies and failure to use the born-again experience as criterion for membership.
I know this sounds harsh, but the gate to salvation is straight and the pathway is narrow. Few will enter into the kingdom of God.
The safe place to spiritually reside is in a holy church. Now step back and look. Does your church teach and preach solid truth or is it contaminated even by the lie of evolution?