I kind of thought the Jerusalem was a hoax, just because of the location of it. There is only like 3 or 4 different images. So if you can explain 3 of them, you already pretty much shown they weren't anything.

The last part is obviously a hoax(or the guy is crazy, he did say he was kicked out for medical reasons). If an alien is advanced enough to move between dimensions, there isn't anything we are going to do to stop them from wiping out everyone in a day. I doubt they need to infiltrate anything hehe.