Ok that sounds like a little bit of a generalisation but I don’t how polarised the local media portrayal is of the different factions. In the UK broadcast media are legally required to be (in general) balanced so the stereotypes tend to focus between left, right & monster raving looney tend to be more ideological or class base than personal identity.
I believe this varies from state to state?
A lot of philosophy & belief training do start with the bible stores & parables of religious education before learn about other faiths & how humans think.
If you exclude either completely you do create division rather than tolerance & it’s frustrating to the excluded - do have a look at the thread about inclusive ceremony of remembrance as that has been quite respectful to various different view points.
Worth reading with a good mug of tea 