The only reason they believe it is because Trump is telling them to believe it. This is nothing but circular logic. Tell people something happened with no evidence, people then believe it happened with no evidence, so now we have to take it seriously, even though there is no evidence. ANd also, you are acting as if it hasnt been looked into. If there was anything to this you know Trump's people would have presented by now. Basically, you want our government to operate based off conspiracy theories.
Cruz is literally trying to not have the election certified based on conspiracy theories, so yes, he is most certainly asking for a lot, and he doesnt need to remain as a Senator.
ANd honest question, where does it end? Do we have to investigate every internet conspiracy theory now? Or just the ones that would help Trump destroy our Democracy?