The correct answer to this open question is the following
Although there are no options attached we can say the following.
I think what motivated Razin and his followers to take action was that they were sick and tired of the many injustices and aggravations suffered due to the oppressive and despotic practices of the Russian tsar. I also think that Razin and his forces were able to defeat the tsar's soldiers because he could unite peasants, Russian people, and soldiers to join Razin and his rebels to fight the tsar's troops.
Stenka Razin (1630-1671) led the Cossacks to rebel against the nobles and the tsar in the southern territories of Russia from 1670 to 1671.