I don’t generally like to answer questions like this, because once again, this is a question asking for a personal opinion. And my opinion isn’t representative of every Indigenous individual.
But, in my opinion; “we are all indigenous” is something that New Wave crystal huggers and permaculturists are extremely fond of saying. But in my opinion it sounds ignorant. It may have been true once upon a time, before slaves, indentured servants, gentry, refugees, and voluntary immigrants, but not anymore. Taking land from someone else and claiming it for yourself, doesn’t make you “indigenous to it”. It just makes you a douche. There are significant differences between being Native by having been in a culture and community that is part of this land since time immemorial, and striving to become “Native” by learning how to live in a place as part of it and adopting or taking it over for yourself.