Can anyone be save in every church?
Thank you for the question. Like every other question related to life and godliness, we should want to know what does the Bible say and particularly what does Jesus say about it in the New Testament.
In Matthew 16:18-19 he said, "And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it. And I will give unto thee the keys of the kingdom of heaven: and whatsoever thou shalt bind on earth shall be bound in heaven: and whatsoever thou shalt loose on earth shall be loosed in heaven."
Please note "my church". It is His and it is singular. Any and every other is not His. We therefore should find out about "His church" and seek to be a part of it.
Acts 2:47 tells us the saved are added to it and Ephesians 5:23 and 25 says He is the saviour of and loves the church. Surely we will want to be a part of that church.