Managers chief John Barnwell says speculation about the future of England boss Steve McClaren "beggars belief".
England must rely on Israel avoiding defeat against Russia and then beat Croatia at Wembley to have a chance of qualifying for Euro 2008.
Barnwell told BBC Sport: "He (McClaren) hasn't failed yet and they're already bringing down the guillotine.
"It beggars belief that people can be hounding their own national manager before these important games."
The chief of the League Managers' Association argues that McClaren is actually a better manager now than he was when appointed England boss.
"He was appointed a year ago and is a better manager now, because of his experience," the 68-year-old said.
"If you've got the FA making decisions off the crowd's reaction, what does that say about the game?"
Barnwell believes the position of England manager has become a "horrendous" job.
"It is an absolutely horrendous job, because you've got the players for something like 50 days a year," he said.
"What can you do with them in terms of changing attitudes or systems in that time?
"Saying that, every single manager that's got any ounce of desire will want to manage their country."
Reports the Football Association will monitor the Wembley crowd's reaction to McClaren during the upcoming games against Austria and Croatia have angered Barnwell.
He said: "I read the FA spokesman saying a lot will depend on the crowd's reaction.
"Well, if you've got the FA making decisions off the crowd's reaction, what does that say to the game? It beggars belief."
Meanwhile, Professional Footballers' Association chairman Chris Powell is worried about the reception England will receive if they walk out at Wembley on Wednesday with virtually all hope gone of reaching the Euro 2008 finals.
He said: "It's out of our hands, which is always a big problem, and we are looking at Israel to do us a big favour. But I dread to think what the atmosphere will be like if it turns out to be a nothing game against Croatia next week."
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