No body should have the right to take some one else's property because they have a need so to do. Because I decide to leave my current place of residence, no matter how bad, for another place which is the rightfully and legal possession of another, in order that I can be enriched by that action to the obvious detriment of the legal owner can never be justifiable. My question must be if I decide to enter another person's house for the purpose of gaining what I do not legally own for myself this is seen as stealing. What is different when it comes to the illegal occupation of another's property. 
Our law is an ass.