Your dream presents some intriguing symbols and themes that can be explored for deeper meaning.

1. Squatter in the Closet: A squatter typically represents something unwanted or an intrusion in your personal space. This may symbolize a fear of invasion or a situation in your waking life where you feel someone or something is encroaching on your boundaries.
2. Self-Defense Weapon: The knife you intended to use for self-defense signifies your desire to protect yourself. However, the bite marks on the knife could indicate that you feel unprepared or that your defenses have been compromised in some way. It might suggest feelings of vulnerability or that you are facing challenges that have left you feeling exposed.
3. The Name "Judas": The reference to Judas can symbolize betrayal or feelings of mistrust. In the context of your dream, this could imply that you may be dealing with feelings of betrayal in your life or that you are wary of someone you once trusted. This could also reflect internal conflict, where you might be questioning your own loyalties and decisions.

Overall, this dream could be highlighting feelings of vulnerability and the need to protect your personal space from negative influences or individuals who may not have your best interests at heart. It might be beneficial to reflect on your relationships and consider if there are any areas in your life where you feel betrayed or threatened. Taking steps to reinforce your boundaries and ensuring you have a support system in place may help alleviate these feelings.