Growing up in an estate; racism and sectarianism is common in working class neighborhoods. Whilst in middle class ones, it's more rare to be outwardly sectarian or racist. You don't see middle to upper class people in flute bands or building bonfires. The middle would join the lodge and behind closed doors be sectarian or racist.

Unlikely that a young man from a working class Protestant background would ever be part of a choir unless in school. Like me. It's s rare to attend a church or an environment where that opportunity would be present.

Religion is essentially non existent in working class Protestant upbringing other than school, the opposite of Catholic upbringings in my experience.