Really:
1. The IDF denies it.
2. Al Jazera reporter, in real time, saw the missile go awry
3. Radar/Satellite from multiple sources confirm it.
4. Hamas is on the radio, real time, saying it
5. Several independent videos, including this one
6. Pallywood is a known thing, and they’ve already been busted lying.
It’s willful disbelief at this point.
I don’t think that you understood their post. Read the entire post.