Being kind to them is completely wasted effort.
Replying to them is also wasted effort as they won't be persuaded.
However leaving bullshit unchallenged might make trusting bystanders believe that this is actually the truth.
one side of this debate is very much NOT acting in good faith because they rely on the status quo being maintained to continue what they are doing
For every article you can find in support of one camp, one could find a counter piece from other credible sources as well (i.e. NYT vs The Economist and The Atlantic). For every NGO one can quote, someone else can quote from someone who've resigned, or once run/founded the very NGO that they're now criticizing (i.e. Danielle Haas, Ira Glasser, Nadine Strossen, Bob Bernstein). You can even pitch the NGOs against one another, such as HRW and Amnesty against the ADL.
Ultimately, bad faith actors are indeed the root cause of the problem. However, I think the bigger problem here is the inability of these bad faith actors to recognize that belong to the very group they're criticizing. If facts were all that mattered, I would expect to see more people expressing more nuanced takes, or express more uncertainty. After all, it would be rather surprising for a consumer of news to hold their view with that much confidence when even the mainstream sources they are relying on is in dispute with one another.