There is no verifiable evidence in the provided sources that Mark Levin of Fox News made the specific claims that Zohran Mamdani is a Marxist, antisemite, racist, or bigot using the quoted language.
Mark Levin of Fox News: Zohran Mamdani is not a socialist, he's bigger than that, he's a marxist. He's an antisemite, he's a racist, he's a bigot, you name it. Just because he doesn't walk around in a white robe and hood, or have the sign of the third reich on his chest, he's all of those things.

FactVerify
Source: factverify.com
Key Evidence
No credible source among the search results directly attributes the quoted statement or similar accusations to Mark Levin.
The closest related content involves other Fox News personalities making strong claims about Mamdani but not Levin himself.
Extensive searches of Fox News content and related media coverage do not reveal this statement.
What the Evidence Shows
The claim attributes a series of severe accusations to Mark Levin, including labeling Zohran Mamdani as a Marxist, antisemite, racist, and bigot, with a highly charged comparison involving white robes and Nazi symbolism. The search results include multiple references to Mark Levin's commentary on Fox News, mostly related to foreign policy and political events, but none directly quote or confirm this specific statement about Mamdani.
One source mentions a Fox News personality (Jason Chaffetz) making an extreme claim about Mamdani wanting to eradicate Jews, but this is not attributed to Mark Levin. Other sources discuss Mamdani in different contexts but do not corroborate the exact quote or accusations from Levin. Given the absence of direct evidence or reliable sourcing for this precise statement, it cannot be confirmed that Mark Levin made these remarks.
The language used in the claim is inflammatory and specific, which would likely be documented if publicly stated by a prominent media figure like Levin. Without such documentation or credible reporting, the claim remains unverifiable based on available information.