is there any EASY (i am not familiar withediting the thousands of files in some notworking java programs - like gff editor) to delete helmets animations in game?

I haven't seen any animated helmets, but if you're asking to hide the helmets, the closest thing I can suggest is using this mod to change the appearance of the helmet to a small circlet/headband.
https://neverwintervault.org/project/nwn2/script/charlies-item-appearance-changer

The mod has some incompatibilities with other mods, so it's best to install it, use it, and remove it when done.