How should I feel? Angry, frustrated, etc?

My brother is going on vacation and he has a Canon camera EOS DSLR, miniature Canon camera, and a Lumix Compact Camera. The Canon camera and Lumix Compact Camera are not the best quality but he is going to bring the Lumix one. I have a Nikon J1 Camera, which is compact and relatively good. He just stole the camera from my purse while I was at school and he wants to use it because it is compact and good in his opinion. He didn't even ask me to use it. How should I feel about this?

What he did was rude-let him know.

He stole something of yours. I would feel angry, but if you had to ask how you should feel, then maybe you don't care.

I think you should tell your brother that he didn't ask for your permission. I would be frustrated.

Temporary you feel angry, but after some time you will remember this like a prank,
but it is normal between brothers and sisters happen these things

Kill him…

Just tell him that that was rude! I would be angry.

Shoot him (LITERALLY)

Since he already has it, and he is going on the vacation, let him take it. Tell him that you wished he'd asked first, and to please bring it back in one piece.

Don't be angry: you'll just hurt yourself.

Upset! HE has not right to do this, even if he is your brother.