Hah not where I live. You must live in a fancy part of Australia. I saw more cleaner toilets in the backwaters of China than here. At least when I did see them haha

IMO disrespect to public spaces arises from apathy (India/China are good examples), social tensions and abstractions (government taxes/responsibility).

While I don't think racial homogeneity is apart of it, cultural compatibility absolutely is. It's mostly co-incidence that differing racial groups carry differing culture baggage. As any race can adopt kinder cultural values and principals.