When confronting the MUTOs, Godzilla exhibits threat behavior, such as the iconic roar. Predatory animals make these displays to scare off competitors for territory, food, or mates - not prey. After defeating them, he also does not show interest in feeding on the remains.
Errors in geography
That unit has been discounted and would not have been issued to US armed forces since 2010. The new SOCOM block 2 has the PEQ15 laser box as a replacement. The biggest difference in the two units is that PEQ16 has a Visible Laser with IR laser and IR laser designator. While the PEQ 2 only had an IR laser and IR laser designator. This US Army has replaced all PEQ2 models with the Insight AN/PEQ15 and in case of the navy and marines it would be PEQ 16. (Dependent on units and missions)