I just picked out a group of flags. The Eureka flag was one of them. Its only a racist flag if you use it in that manner.
So the Uniting Church flag is OK, the RSL flag is OK, presumably you have no issue with sporting flags as well?
It seems to me that you approve of a great many flags. The more that are produced, the more you change your stance.
You just seem to get stuck on the indigenous flags...
You approve of the Norfolk Island flag, but not the Torres Strait Islands flag.
You approve of other flags of Australia because they have some political attachment. But despite the Aboriginal and Torres Strait flags being proclaimed flags of Australia, they still do not meet with your approval.
You approve of church flags because they have a religious grouping. But you cannot approve of an indigenous flag because you believe it has an ethnic grouping.
You approve of every almost every other flag imagineable for a whole host of reasons, and will probably continue to do so, but you can't widen your scope far enough to include the Aboriginal or Torres Strait Islands flags. And your only reason is because you have concluded that they represent indigenous people... of Australia.
I'm not Aboriginal gunning, but I think the Aboriginal and TS flags represent an important part of the Australia's heritage.
Moreover, both are official flags of Australia and have been recoginise accordingly by proclaimation:
The Australian Aboriginal flag and the Torres Strait Islander flag were proclaimed as flags of Australia under section 5 of the Flags Act on 14 July 1995. Section 5 provides authority to proclaim "other" flags and ensigns and it had previously been used to give official status to the ensigns of the Royal Australian Navy and Royal Australian Air Force.
http://www.crwflags.com/fotw/flags/au-ab_st.html
Might be an idea for you to just get used to that fact.