Re: People who hate Desis the most are…
Regardless of how much Sanskrit evolved in other regions, it is still a Pakistani language with roots in Pakistan.
Forget your bogie bogas, Panini was Pakistani.
If a Black Tswana person from South Africa starts speaking Afrikaans in his own distinct style and accent does it make Afrikaans a South African language? Of course not, it will always be a European languages brought to Africa by the Dutch.
Hindustaniyon ki saqaafat aur tehzeeb hamaarey phenkay huwey tukrron pe qaaem hai. 
Not only your culture but even the name of your country “India” is derived from the name of our country “Indus-Valley” (aka Indusiya).