The abandonment of some churches of Traditionalism isn't necessarily an abandonment of doctrine. Many communities are now void of Traditional churches entirely within a given denomination. Those who want to maintain Traditional worship are forced to drive long distances, or begin holding services in their own homes. This is becoming more common than you might think. You can thank the "Purpose Driven Church" for this phonomenon in my area.
"But I also know that I need the support of a community of Christians. So I choose to attend and keep my silence on areas where we differ."
Never be silent. This allows the PC crowd to win.
The traditional Church, which really just means that Church which has been in practice since the earliest times, does not contradict the Bible. It's people who self-interpret the Bible that contradict the Church, as it clearly states in 2 Peter 1:20, and 2 Peter 3:16.
Only the Church has the authority to interpret Scripture, as it again clearly shows in Act 8: 27-31. In this verse the highly educated eunuch from Ethiopia, and recent convert along with his Queen, was reading Scripture but did not understand its meaning. The Holy Spirit then sent Philip, (who was commissioned by the Holy Spirit to teach the gospel), to help the (very well educated) eunuch understand what he was reading. When people take up the Bible and make themselves the interpreters, all they really do is crown themselves Pope.