The Bairds of this world get away with their behaviour....

Because we let them.

John Baird should have been physically removed from the committee room when it became apparent that his sole purpose was to disrupt the sitting committee.

There was no descent into chaos. Baird had every intention of disabling the work of a parliamentary committee. The push back was called for.

Keep in mind that John Baird is a party-state bullshitter. When he gets called on it, to his face, he squirms.

And never forget that he gets his marching orders from the top of his party's unitary command.

The parliamentary battle of the NSDAP had the single purpose of destroying the parliamentary system from within through its own methods. It was necessary above all to make formal use of the possibilities of the party-state system but to refuse real cooperation and thereby to render the parliamentary system, which is by nature dependent upon the responsible cooperation of the opposition, incapable of action.

Ernst Rudolf Huber (witness)
From the Chief Counsel for the Prosecution of Axis Criminality
Volume I, Chapter VII
1946

One couldn't make that comparison unless it existed.