As we can conclude, their plan was to use the gateway to seize the Keltracel White factories and thus free themselves and other Jem'Hadar from the Dominion.
But, as has been shown in To the Death, many Jem'Hadar were eager to serve the Founders even without the addiction and thus would have remained loyal to the Dominion.
So, there would be a Jem'Hadar civil war (or an even wider Dominion civil war since worlds subjugated by the Dominion certainly would have risen against it, perhaps teaming up with Jem'Hadar rebels).
Wouldn't it be better for Sisko not to help Weyoun but rather stand aside and watch how their main adversaries are weakening themselves?
But, as has been shown in To the Death, many Jem'Hadar were eager to serve the Founders even without the addiction and thus would have remained loyal to the Dominion.
So, there would be a Jem'Hadar civil war (or an even wider Dominion civil war since worlds subjugated by the Dominion certainly would have risen against it, perhaps teaming up with Jem'Hadar rebels).
Wouldn't it be better for Sisko not to help Weyoun but rather stand aside and watch how their main adversaries are weakening themselves?