Question: "Not forsaking the assembling of ourselves together...," Hebrews:10:25 says. In these days of false teaching and apostasy, it's sometimes hard to find fellow believers who continue in biblical teaching. Many are reading the latest book or want to get together to watch a "Christian" comedian or video. If one is unable to find suitable fellowship according to biblical standards, what is the alternative? Is it sinful to separate to the point of being secluded?
Response: I don't know your specific situation, but whether in a church fellowship or not, and especially if you have children you must daily have home Bible instruction and prayer. Don't depend on a "church" to fulfill this need. If your present church is lacking in sound biblical teaching, discuss your concerns with your pastor and/or elders in a non-confrontive way. At the same time, be faithful in serving the needs, both physical and spiritual, of your present brothers and sisters in Christ.
As a last resort, separation may be necessary. Others may wish to join you in a home fellowship. I can think of many large churches that had such small beginnings.
Above all, guard against Elijah's plaint, "I, even I only am left" (1 Kings:19:10). Remember instead that Paul found soul-satisfying fellowship with his Lord even in prison (Acts:16:25). May God bless and lead in your decision in this matter.