I love hinduism. Pushpak is no doubt symbolic but some nutjobs believe pushpak vimaan was a real invention and aeroplanes were widespread in early in those times. It is conflating those symbolic things to real world inventions and losing scientific temperament. Also this is the most widely available study done on 500 skeletons. In science terms its a very large sample. All science studies whether humans came out of Africa or evolution theory has been presented with much smaller samples. So unless you can show some proper peer reviewed study and prove existing studies wrong just believing in conspiracy theory won't help. BJP has been for 13 years now still they couldn't prove a single thing about out of India theory. Sinauli excavations result has been purposefully held back as they will also reinforce what rakhigiri proved.
Also if Sanskrit came from outside or Aryans migrated it does not diminish Hinduism that's your biggest misconception. It just proves human migrations are an essential part of evolution and also Aryans did assimilate and intermixed with Indus valley people. Today we have on an avg 40% genes from AASI, 40% from Indus valley and 20% from Aryans. It just shows we today are inheritors of all 3 heritages- Early Indians who won against Neanderthals and Denisovans, Indus valley and Aryans. Existing Hindu beliefs is ammalgation of all those beliefs as it incorporated many local culture within its fold. Kul devta concept, bangles, mangalsutra or most probably modern Shaivic beliefs(amalgation of Rudra from Rig Veda Pashupati from Indus valley) are not original Hindu beliefs but local folk beliefs incorporated.