Its a good question -- and by that I would take also - what are they ? In other words -what are their values- their intentions- their history that demonstrates their character for us ?
If we knew that we could be sure WHO they were- we could judge them by their past actions. We don't have any idea what so ever "Who" they are- and yet we want to invite just about anyone over. All they have to tell us is they hate Reptilians ! Seems like a very short list to investigate - "who" they are.
I say we make a much longer list.