We've been observing homosexual behavior among animals for centuries, yet as recently as the mid-2000s a large contingent of biologists still denied it existed - literally denying what was happening right in front of their eyes ! 

A lack of diverse perspectives absolutely taints science. These are just a few examples I can remember of the top of my head. There are countless more. Now I am not familiar with Raju, I don't know his work and can't judge if he deserves a university platform or not. 

But I can judge the claim YOU made and, to quote Neils Bohr, it's not only not right, it's not even wrong ! (I.E. an idea so far and obviously removed from reality that you couldn't even gain knowledge by disproving it). 
https://rationalwiki.org/wiki/Not_even_wrong
"As a more formal fallacy, it refers to the fine art of generating an ostensibly "correct" conclusion, but from premises known to be wrong "