I mean, it would be more suspicious if the aliens contacted us 2000 years ago, BUT ONLY THE JEWS, and then stopped talking to people altogether but hey...
Hym "Yeah, so, MAYBE they are supposed to be an armada and they are trying to invade use but because of how faster than light travel works they are all arriving at different times. Like they are taking off factions of seconds apart but because of some kind of time dilation or distortion caused by faster than light travel over large distances they are arriving years apart, right? And they get here and they're like 'what the fuck bro, were is everybody?' So they just turn around and leave. Now, I know what you're thinking... 'Why would they not test it first?' Right? But if they did it would likey be with one ship at a time. Right so you have videos of 3 of the UFOs linking up and they all 'Hey dawg, like, where the hell is everybody? What do we do?' And gleepglorp is like 'Uuuuuuuh shit, I donno man.... I'm not getting anybody on coms... Let's... Let's just get out of here man.' But they still haven't realized that the time distortion is happening so they go back and it's like 2000 years ago on their planet and they all get stabbed to death and cannibalized by their own ancestors like a reverse grandfather paradox or something."