FOX News won't run VoteVets ad on climate change. It's 'too confusing'

Ben Smith has the rationale from FOX News for refusing to run an ad from VoteVets. According to FOX News executives, this ad is "too confusing." Huh? Watch for yourself. It seems pretty clear cut that climate change affects national security:

I guess if people don't believe in climate change, then tying climate change to national security would be confusing.