Note that in Shakespeare's time an audience would directly have understood "make a shambles" here to mean violent bloodshed in the parliament building because a "shambles" would have been a common term for somewhere you killed animals to produce meat. Which is exactly what is being described here. Henry VI part 3 is not a play about a polite disagreement settled over lunch...

Today "shambles" remains in the common vocabulary, but only in a sense of things being messy or disorganised, most English readers today probably wouldn't think of literal violence and I suppose that the people who named this website, likewise, were thinking of modern usage.