I think part of the problem with some people’s perception of Israel is that they can’t quite believe that Jews have actually maintained an unbroken line of tradition and religious practice for nearly 2000 years.
How could they possibly have been able to sustain this continuity for so long whilst in exile? How could they possibly be the same people who were kicked out of the Levant all that time ago?
I have seen some who claim that all European Jews were descendants of the Khazars and so couldn’t possibly be direct descendants of those exiled originally. This seems like a very convenient justification, with absolutely no evidence behind it. But then, people will always conveniently forget the truth when it suits their purposes.