Note that Go 1 is a "language freeze", not the implementation freeze.
Now that it's known there's a bug that will be worked on later, people proposed possible workarounds, the easiest of which is to switch to 64-bit platform. I agree that downplaying the issue is wrong, but only one person did that.
There is occasional rudeness, mostly caused by strong opinions, but overall I think Go community is pretty good.
I couldn't find the adequate words to express this so far, but the reason I at all find this situation worth commenting on is that is reassembles to me a very common pattern of denial I observe among many professionals in various professions in cases where a problem appears that is very hard to tackle or even to analyse in the first place. Often a doctor who has troubles identifying a disease will tell you it's probably just something in your head, a programmer who has trouble reproducing a difficult bug will tell you it's you who probably did something wrong at some time, even a guy who I called to repair my washing machine that was stopping the washing at random told me to "keep it under observation" when he wasn't able to tell what's wrong. Many people simply do not want to put in the work needed to solve an unexpected and difficult problem, and thus, perhaps even subconsciously, try to handle it by pretending it doesn't exist. If you want to be a real professional and a leader in what you do, you can not behave like that, you can not repress a problem when someone reports one to you, you have to have the patience to examine the issue, the experience necessary to know when you can be certain that you have the complete picture of it, then sometimes the courage to admit there really is a problem and then finally you have to solve it, or people will not respect you.
The fix is well-known (a precise GC), just implementing it hasn't happened yet.