Just look at the reactions you have witnessed to whatever evidence/arguments you have presented to date...the open minded will start to reconfigure their beliefs. Challenge what they have learned to date and discard what needs to be discarded...what we see is that they discard physical evidence in favour of orthodox explanations etc..
Isn't it true that many myths, handed down orally, give us clues into the past? So when they tell stories which advise that everything they learned, they learned from those who came from heaven above (sort of idea)...just disregard? When eyewitnesses in Pheonix talk off Mall sized craft floating overhead...do we disregard? The answer is overwhelmingly - yes - because it doesn't fit in with what we believe to be true...must be true.
Maybe we would get somewhere if 'serious' academics actually looked at all the evidence ...drill holes, perfect craftmanship performed underground in the Seraeum etc.. Planet of the Apes? Intervention? ...yes, lost civilizations with giants and all the rest of it ie: vimaanas and high tech building/warfare in the past.