You know, renting your property is not an existential struggle and not everyone who reads Breitbart wants to have you and yours ethnically cleansed. There are laws to protect you, and you really don't need to be helping out the police with your fears.
Should we just throw them into water and see if they float? Or administer a "are you a Nazi" test on a polygraph?
EDIT: This is a problem of the current political climate where words have lost their meaning. A lot of people even remotely right of center have been called a Nazi or "alt-right" or "white-supremacist".
How about good old fashioned, "Is that a fucking swastika your friend is carrying over his shoulder?"
Obviously, you can't tell if someone is a Nazi, so only those who openly display their ideology should be banned.
But generally, yeah, let's test people for lack of empathy and other things. That would be much more interesting than what particular ideology they dress the underlying issues up with, and it would also address the "shutting people up for voicing things we can't handle because they're correct" crowd that hide under the mantle of social justice and whatnot.
Yes, the "Nazi ideology" espouses this. But you are renting to actual people, and
1) You have no way of knowing whether _they_ really espouse the ethnic cleansing of you and yours, or whether you just think they do. Lots of people wear swatstikas but they don't actually favor mass extermination. There are holocaust deniers who are called Nazis and maybe even view themselves as Nazis but, pretty much by definition, don't support the holocaust. As another example, elsewhere in this thread you have made characterizations about me that don't have any basis in reality, so who is to trust you to decide whether someone truly wants to ethnically cleanse you and yours?
2) even if they were _actual_ Nazis, which you have no way of knowing, by renting to them, you and yours are not going to be ethnically cleansed. The fact that someone has a political belief is not in and of itself a cause to make them fail to pay rent or fulfill any other of their obligations as tenants. As a result, in many jurisdictions, it's illegal to not rent to them.(a)
3) There is a strong likelihood that landlords will end up refusing to rent to people whose views they don't like. A capitalist landlord can refuse to rent to a communist, because the communist wants to overthrow them. That will turn into not renting to someone who is interested in communism, etc, which will turn into not renting someone who attends a communist rally. Someone else in this thread decided that a Swatstika on a "friend" would be enough evidence, so now we are getting into not renting to someone based on their associating with people suspected of Nazism, etc.
(a) In California, it is illegal to not rent to someone based on "arbitrary characteristics" not related to their ability to fulfill the terms of the lease. See, e.g. http://articles.latimes.com/2014/mar/30/business/la-fi-rentw...
Again, the laws differ jurisdiction by jurisdiction.
Believe me, it's not the leftists who end up owning most of the property. These protections are part of living in an open society in which people are not discriminated against based on their beliefs. As we get more of a housing crunch and in many cities there is a growing population of renters, it becomes more important that your political affiliation not disqualify you from access to shelter. This may mean that some landlords have to rent to those whose politics they dislike, but that's the price of living in a free society. You are free to espouse any ideology you want as long as you don't break any laws.
If they're Nazis, make Hitler salutes, and fly flags with swastikas on them, of course I do! That's practically the point of ideology lmao
People wear transgressive symbols and put on transgressive displays in order to piss others off and show their own independence. But wearing a Che Hat doesn't make you a communist, neither does sporting a hammer and sickle arm band. Neither does singing the International. Please don't confuse performative displays with the real thing: kids dressing up as historical cowboys and indians are not actually cowboys and indians. Stop pretending.
Lastly, we don't live in a society of self-help for this stuff. You are obligated to rent to anyone who can fulfill the terms of the lease, and if you don't like that, then get out of the rental business. Let the police be the ones charged with preventing mass extermination. Petty discriminations don't help protect anyone.
You can expect that if stuff like this starts happening more often, other jurisdictions will also respond.
In general, "I am free to not rent my property to a certain undesirable element" has a pretty ugly history, as most societies don't view housing as just another optional consumption good.