The problems with a lawsuit against Kyle is that Rosenbaum and Huber’s families as well as Gage don’t have anything to lose or even have to spend any money. They’ll have a team of 20 lawyers who normally work for $1000 each working pro bono who don’t care about winning, just hurting Rittenhouse. I don’t think you can sue the families of the dead and Gage doesn’t have money to make it worth it. Rittenhouse can’t even raise money on Go Fund Me and his lawyers are going to want some kind of payout.
Also, civil suits don’t have a presumption of innocence or double jeopardy - people with money and power have far more advantages.
Keep in mind that the people who oppose us have all of the money and power, they can easily hound people into bankruptcy without worrying about money.