Leaving aside your disingenuousness in claiming that you're not implying anything about the topic with this thread, how precisely would you expect me or anyone else to prove that institutional racism does not exist? Should I produce documentation of the absence of racial discrimination lawsuits? The absence of racial motives in suspending black students from school? How would that work?
In contrast, it's much clearer how the people making the assertion could prove their positions: discovering documentation of systematic racial job discrimination, documentation/video/audio evidence of school administrators deliberately targeting black students, and so forth.
When someone shuffles as you're doing in this thread, it tells me that he's not confident in his position and is trying to avoid the central issue. If you wish to be coy and pretend that you weren't implying that white guys are lamenting their discrimination and that this is silly, proceed. It appeared from the first response to your initial query, someone was onto what you were doing. To then claim, "Hey, I'm not saying it, just some people say it's true" is weasely.