Halo 4 is ripping off of Resistance 3.

You can see through walls on resistance. Nobody said anything about 343 ripping off of resistance when they announced this.

Yet when Halo does something similar to COD, people start pointing finger. Even though COD probably wouldn’t be a successful online game franchise today without Halo.

Woah! Because a XRAY ability belongs to that one game! they totaly were the first to come up with that idea!
No.