It's disingenuous to frame the problems people have with the 1% as being due to them not positively contributing to society.
Rather, the entire capitalist system, tax loopholes, and corrupt politicians have lead to increased disparity between the rich and poor.
I'm fine with the claim that some people who create value and are net-positive, such as many of the rich people, absolutely should have significant wealth.
However, they should not have the level of wealth they have now, wealth that is enough to feed every homeless in their cities for centuries, wealth that could house and clothe the needy for decades....
We should not have loopholes like the estate tax reductions which mean even after they die, their family line can greedily clutch onto the money for generations to come, creating a severe class divide.
Just because we are angry with the system does not mean we all think rich people are innately evil.
Also, we have all the evidence we need to condemn the current distribution of wealth: the current distribution of wealth is self-evidently disgustingly bad.