Yeah. That about sums it up. But there is also a lot of overlap. A colorful Vann diagram with iconic examples might attract more eyes.
>Why filter? Is your mind too weak to sort trash from non-trash?
It's more about saving time when multitasking and not being tempted to give (You)s to asinine bullshit. The latter is something I struggling with, as you can see.
No one is attacking anime. No one cares enough about anime to attack it. However, one of the shills has decided to use anime as their signature to establish an identity. It's like namefagging or signing every post with "Daniel". The purpose of this is to start drama. Drama doesn't happen without distinct characters. The anonymous nature of the chans precludes one of the most effective trolling tactics.
It would be no different if they decided to use cats or trees or anything else.