No. The Knesset (Israel's parliament) enforces a formal dress code for all visitors, and Crocs — or any open-toed, casual footwear — are not permitted.
The Knesset is both a legislative workplace and a national symbol. Security screening is airport-level; decorum reflects the institution's dignity. The rule applies to tourists, journalists, lobbyists, and guests — not just MKs (Members of Knesset).
If visiting on a guided tour (available Sundays–Thursdays in English, Hebrew, Arabic, Russian, French, Spanish), wear smart-casual business attire and comfortable closed shoes. Security will deny entry to non-compliant visitors.