Agreed, I think the word "bias" kind of depicts the issue better in some cases... Bias, detailing an upbringing that is devoid of knowing, respecting, being conscious of, and considering cultures outside of one's own...

I don't think it becomes the larger (societal-level) instance of racism until it is willfully and intentionally applied towards holding others of a specific race down, or discriminating against the race of others in esteem.