I will give him a chance. Same as most anybody.
Now if Jerry brought Zeke back, for example, no I'm not giving him a chance, he's had his chances with the team. We have an ample body of work to show what he is and could co.
That's not the same with Parker, he's new to the team and new to the DC position. So he's due a chance.
But here's the thing - by bringing in players like Clark, Gary, Miller, Bullard et al, as well as having a 33 yr old qb with somewhat of an injury history, guys like Steele who are getting along in NFL years, Jerry has put this team in a win-now situation, whether or not that was his intention.
That being the case, it's not a good idea to bring in greenhorn DC who has to learn on the job to get to top DC status. By the time he gets to that level Cowboys will likely have a new draftee quarterback, Lamb may be done, as well as Pickens, Steele and others due to age, and good players on the team like Beebe and so forth probably will be gone to other teams due to salary cap considerations.
Just not the right hire given the Cowboys' current situation...