There's stretching the truth, which all politicians do.
There's being too short-sighted to verify your family legend before you start putting "American Indian" on your registration forms.
And then there's multiple cases of apparent large-scale fraud.
This guy lied about just about everything, in order to get elected. He lied and said he went to college in places he did not. He lied and said he worked at Goldman Sachs and Citigroup, when he was actually a customer service rep at, I think, a cable TV place. He lied about his grandparents being Jewish Holocaust survivors. He lied that he had employees killed at the Pulse Nightclub shooting. There are questions about where his money came from: He hasn't explained the 700 grand he came up with at the same time he was defaulting on other debts. We don't even know for sure where he was born; he might actually be from Brazil—where, by the way, he is currently being investigated for stealing some old man's checks.
Congress should refuse to seat him until he is investigated. I would hope some LEO organization or another would consider arresting him for fraud. I wouldn't mind seeing him locked up or, if applicable, deported. However, I don't think any of this will happen, because Kevin McCarthy desperately needs to keep his House majority, not to mention Speakership votes.