Given the Founders xenophobia war was inevitable and I doubt very much could have been done to avoid it.
From what we can infer from DSN, Dominion Space didn't as yet reach the GQ end of the wormhole. The Dominion appeared to lay claim to the space after the Federation and friendly races started laying claim to it.
The Dominion fired the first shots by attacking vessels and destroying colonies. They appeared to be no attempt at making contact to establish a peacful dialouge
You can argue that mining the wormhole was provocative, but the Dominion could have done exactly the same too their side of the wormhole to prevent ships coming into the region they claimed.
From what we can infer from DSN, Dominion Space didn't as yet reach the GQ end of the wormhole. The Dominion appeared to lay claim to the space after the Federation and friendly races started laying claim to it.
The Dominion fired the first shots by attacking vessels and destroying colonies. They appeared to be no attempt at making contact to establish a peacful dialouge
You can argue that mining the wormhole was provocative, but the Dominion could have done exactly the same too their side of the wormhole to prevent ships coming into the region they claimed.