Ummayads were incredibly based. It's normal to persecute those who want you to take away your political power. That's just how it was back in the days.
I like how you ignored the Rashidun Caliphate. Offensive warfare was sanctioned by none other than Abu Bakr (ra) and Umar Farooq (ra), two of the greatest companions. The Ummayads simply carried on the imperialistic project.
After the Ridda wars, the Rashidun Caliphate decided to use the Arab warriors that had gathered under Islam against Sassanid and Byzantine Empire
The idea that Islam doesn't allow offensive warfare is the greatest lie ever told.
Notice this Salafi Sheikh says it's only not allowed when you don't have sufficient power. If you are powerful, offensive Jihad is permissible
Insha Allah, we will do this to India one day