For anyone reading and not understanding why Redmayne's comments are harmful, please consider this.
What he's saying can be seen as reasonable at a glance. He's calling out the specific, vitriolic, violent, hateful comments specifically and not the general condemnation of Rowlin'gs bigotry.
The issue here is that while some of those comments are indeed disgusting and incredibly counterintuitive, they are an extreme minority. Most people are not doing this. Most of the people angrily calling her out are not doing this either, anger itself is a valid response to hateful bigotry and is largely NOT the way these people try to frame it in their defense. There is also going to be a good deal of trolling from people who want to paint the movement against her as violent and hateful.
The point is that Rowling is using the extreme minority of responses like this to use as a shield against the entire movement, and it is rallying people to her side. And comments like Redmayne's lend credence to the idea that these comments are more prevalent than they are, and help skew the idea that general anger and condemnation is "violent misogyny" when it's a necessary response.
People like Redmayne should be calling attention to this, the fact that the vast majority of he movement against her is angry for a GOOD reason and is not resorting to the kind of hateful violence she is trying to use as a shield.
This is especially frustrating when that kind of hate is actually far more prevalent with TERF rhetoric and anti-trans sentiment. Remember, this entire thing is against Rowling's ignorant, pretty, hateful bigotry... she is using her platform to deny the rights of vulnerable people. On the opposing side is people just trying to exist without being denied, marginalized, and attacked. Anger on one side is justified, even hate to a degree. The other side has NO justification for their anger and attacks and hate, and THAT is the thing we need to focus on with 100% of our energy.