Why is walking around, looking about considered "suspicious behavior"?
Because, as has already been shown, repeatedly, over and over, there had been several break ins in the neighborhood recently.
Just because Zimmerman didn't mention the race of the guy until asked, doesn't mean it wasn't a factor in why he was considered "suspicious".
Yes, yes it does, because the only reason that you THINK race was a factor in this whole boondoggle is BECAUSE that idea was planted into the nation's consciousness by a false news report that was never retracted in the same format it was delivered in. Without the false report, there was no reason to suspect race was a motivating factor, period. The only reason you are now convinced, and can claim it "doesn't mean it wasn't a factor" was because the CONCEPT that Zimmerman MIGHT HAVE been profiling Martin was implanted there by our (literally) worthless media and never properly retracted.
And I don't know why they did it. Some might speculate it was because of Florida's black vote being crucial in the 2012 election cycle and wanting to get them riled up and ready to go vote that fall. I would speculate that most media agencies don't have anyone of high enough intellectual calibre and foresight to actually think that far ahead and plan malicious events such as that, so I would speculate that it was almost entirely on NBC knowing if they pushed the race angle, it would help boost their ratings for their news programs. This is why I despise US media and don't watch or listen to it, instead opting for mostly British news sources on stories.
And being Hispanic and Jewish does exonerate him from being engaged in the type of racism that Americans are hypersensitive about, that being the racism of entrenched white power and its effects on minorities, particularly African Americans. Have to be white to get white privilege, after all.
As far as I can tell, Hispanics and Blacks generally don't get along, but that isn't the sort of entrenched power structure and social caste based racism that the social justice crowd are concerned with, and isn't the type of "Racism" that you, or anyone else claiming Zimmerman are a racist, are actually implying, which is that he's a white racist, a white supremicist KKK militia type who wants to hunt down blacks and start a race war type racist. There is a huge difference between the racism inherent between two groups of minorities at the bottom of a social class system (which is usually a racism engendered by the powers that be in order to divide the poor and keep them under control by keeping them in conflict with one another) and the racism inherent between two groups, one being a majority and the power holder, and the other being a minority and the powerless.
When people argue Zimmerman profiled Martin, what they are implying is that Zimmerman, being a white male, used his position of authority in our society to justify his decision to hunt down and kill a black teenager in the street. That's literally the argument being made by the people claiming Zimmerman profiled Martin. Implicit in this argument is that Zimmerman enjoys white privilege and white power and authority, which was why he wasn't initially arrested until there was outcry by the public, and so if he gets off it will be because white privilege protected a white murderer who slaughtered a young black man in the street. If Zimmerman is latino, and jewish, he's not part of the white power structure, enjoys no position of social authority over Martin in regards to his race versus Martin's, and therefore, the fact that he is Hispanic and Jewish pretty much exonerates him from the crime of white power based racism he's being accused of.