Helena Bonham Carter, who played Bellatrix Lestrange, defended Rowling in a 2022 interview with The Times, calling the backlash “horrendous” and adding, “You have to respect people’s views — if they’re not harming anyone.”
Which is a very important point. With great power comes great responsibility and all. She has a platform and chose to use it to spread hate. She's way past expressing a simple opinion. She's affecting people's lives.