Alright, I don't think any of these would qualify as official communications. And, none of them say that it isn't OK to be white. But, here are a couple of points:
1. The fact that a majority of white people feel discriminated against in this country doesn't mean it is true. Personally, I've never for one second felt discriminated against because I'm white. I think the people who do confuse growing equality with discrimination. For example, affirmative action was absolutely necessary 20-30 years ago, but it might not be necessary anymore. But, obviously, a lingering policy that should be changed in no way evidences discrimination. It just means that our government has failed to act, which is true pretty much across the board when it comes to policy that needs changing.
Since during the 60s, 70s, and 80s (and even into the 90s) racism against minorities was extremely prevalent, actions had to be taken to make things more equal. White people were (and still are) in more positions of power, there was segregation (which was inherently unequal, even according to SCOTUS), white supremacist groups were running rampant killing and assaulting minorities, etc. Because whites were on top then, equality would mean that said privilege would slowly disappear to give minorities better standing in this country.
So, it seems that this change, starting to remove some of the privilege that the white population had in this country to make things more equal, makes some people wrongly assume that they are being treated unfairly. But, in actuality, it is the definition of fairness.
2. Individuals in a group making statements are not making official statements unless specifically indicated. It is absurd to hold an entire population (liberals, conservatives, democrats, republicans, blacks, whites, asians, hispanics, etc.) responsible for statements made by individual members of that group.
It would be like me claiming that the views of white nationalists who identify as conservatives represent the conservative movement in general. Or, that the views of that nutjob white supremacists showing off his illegal firearms online who got arrested represent the views of all NRA members.
So, there is no official communication here that I see claiming that it is not OK to be white. Personally, I don't see skin color as anything to be proud of, no matter what color it is. So, any sentiment that people shouldn't be proud to be white rings true to me. We shouldn't get credit for what our ancestors did, just as we shouldn't be blamed for the horrors they perpetrated.