One of the major reasons the U.S. has been able to maintain a free society is the Founding Fathers recognized that everyone won't see eye to eye, and people of like minds usually cluster together. That was the basis of "community standards" and the U.S. Constitution's 10th Amendment ("The powers not delegated to the United States by the Constitution, nor prohibited by it to the states, are reserved to the states respectively, or to the people.).
Community standards holds that, no matter how you want to live, there's a place for you. If you want God central in your community, then there are places where the people choose that for themselves. If you want a community where God is rarely mentioned in public, there is a place for you too. There are even places where you don't have to have a community at all.
That still goes, but it has beem muddled a bit. People who move from one place to another all to often do all they can to bring where they were to the new place... often without regard to those who have always lived there. Federal incursion into local and state matters has further eroded the original intent.
So, what we are left with is communities of people who don't talk to each other, or band with people from other communities to force change.
Some call that "segregation", but if it is done voluntarily, it's really "Freedom of movement" and "association". Like "censorship", true "segregation" only occurs when the government forces it on the people.
As for what is "evil" and what is "good". Good is what provides the most individual freedom possible in a community, evil is what impedes it. Individual freedom is only maintained with the right balance of power between individuals (the people), community (family, neighborhood etc), and government. If either exert too much "evil" on the others, it is personal freedom that suffers... and the freedom to worship according to the dictates of our conscience (including not worshipping at all) is among the most important parts of personal freedom.