and one was yelling racist crap(Gates) and one was exercising their rights to redress of grievance(town hall)
Doesn't matter what you're yelling. There is no description in disorderly conduct laws of particualr speech that is unlawful. The disorderly laws address the distubance of the peace, loud noises, yelling and music.
The stated purpose of this yelling, from the memo is to cause uneasiness.
"The purpose is to make him uneasy, early on and set the tone..."
So the stated reason bears out that the intentions of this yelling is to make someone feel uneasy in public and to "set the tone" with yelling and shouting. The definition of disorderly conduct.
"
Look for these opportunities before he takes questions."
They are instructed to intterupt the speaker before he is taking questions.
This entire memo is a plan to disrupt meetings. If I send you instructions on how to build a bomb but then put in a disclaimer that "these are not instructions to build a bomb", they are still instructions to build a bomb.
These instructions to yell and shout, out of turn, in order to make the meeting "uneasy" and to "stagger" the speakers, is clearly a plan to disrupt and cause disorder. Should be addressed by the authorities.