The definition I have in mind is similar to number 2, but may be colloquial. As applied to a love afair,
A would be said to be carrying on
with B. That is, my usage would be intransitive, while the usage in number 2 is transitive,
a love affair being the direct object.
Etheredge is planning to fight the criminals, not negotiate with them. The interpretation you originally suggested sounds like he's saying, "If the criminals are given a voice, we may as well all give up."
I'll admit you could make a case for "We can't go on like this. Criminals must be eliminated."
I'm leaning toward, "The world cannot allow criminals to participate in the business of government."
- A.