Question

Hello Rabbi,
Recently, because of the war, many girls have been uploading videos of themselves cutting up immodest clothing (to strengthen themselves and that kind of thing).
I wanted to ask:
1. From an educational standpoint, is it good to encourage this, or could it cause harm by making them think that because of their lack of modesty people were killed?
2. Do you think there is a connection between our spiritual state and success in the war (a lot, a little, or not at all)?
3. More generally, what do you think about things like this?
 
Thank you very much in advance. Hoping for better days