I have read many comments of some IshKara/Vrushika fans, so I won't say anything because I don't want to offend you. Can just say that all are not polite and all are not impolite too.
Every fandom has such immature fans be it shivika or ishkara.There is a lot of bashing going on twitter and other sns on OmRu being Useless sidekicks by shivika fans.So yes no fandom is a saint here.Here ishkara fans are aggressive becoz of lack of ishkara scenes.Once story moves forward such complaints will die down eventually.Till then one can do nothing about it.