They have more issues with their Indian/paki counterparts then they do non Indian Muslims. It was the mughals who subjugated and conquered Hindus for years. RSS Hinduvatas is a nationalist movement
Some of them sure, but I wouldn't say all, or even most of them, since they never differentiate between races or ethnicities of Muslims; they make it clear time and time again that they hate Muslims and Islam and see it as a threat to Hindustan or Hinduism/India.