Christian objects do have nasty energies.
I am not sure if they have that kind of curses though.
However, if you approach one of these objects to destroy it, it would make sense you would feel something bad. You would be near the source of negative energy, incompatible with satanic energy.
I got rid of a bible once. I tried to burn it, but it wouldn't burn. So I tried to dissolve it in water. Didn't work either. In the end I just ripped it off into pieces and trashed it. I am wondering if the pages were made of a special material or what. It was weird and annoying.
In any case, I wouldn't worry to much about it. I don't feel there were any lasting curses or anything, just nasty energy when I was touching or near the stuff.
The best is to cleanse yourself and the place you destroyed it afterwards, so you would also get rid of any negative energy or curses you think might be.
Hope it helps.