​Former Manchester United striker Javier Hernandez has backed the appointment of Michael Carrick as head coach -Credit:Matthew Peters, Manchester United via Getty ImagesJavier Hernandez has warned his former Manchester United colleagues who have been criticizing Michael Carrick that they’re walking a “fine line” with their attacks on the club’s new head coach.Carrick delivered an impressive performance after his January appointment, guiding United to third place in the Premier League across the final 17 matches of the campaign and proving himself worthy of securing the position permanently.However, the 45-year-old has encountered criticism, with much of it originating from individuals he once called teammates during his 12-year playing stint at Old Trafford.Donald Trump sparks outrage with Harry Kane World Cup commentsDonald Trump addresses Gianni Infantino’s World Cup sale plans, amidst Kushner linksRoy Keane has maintained his animosity toward Carrick and has made some of his critiques deeply personal, while Paul Scholes turned to social media to slam his former midfield colleague following a loss to Newcastle United. Gary Neville has also raised doubts about Carrick’s credentials for the role, as per the Manchester Evening News.During an appearance on Rio Ferdinand Presents, Hernandez was questioned about his perspective on Carrick and responded: “I love it, I love it.”Ferdinand then highlighted that some of their former teammates had adopted a more critical stance toward Carrick.”I don’t know why. I really don’t know why. There’s a fine line between criticizing someone’s job, because you have to, and then your own opinions,” said Hernandez, who recently signed for an upstart USL Championship team.”I’m very surprised, mostly because you know Carrick more than I do. You spent so much time with him, not only as a teammate at the club but also with the national team. Carrick was always a man who never had a problem with anyone.To listen to the latest episode of ‘All Out Soccer’ – CLICK HERE”The most civilised, calm person. So I don’t understand. How are you going to criticise a manager who is giving you results?”He put your team back into the Champions League, so he deserves the consequence of that: stay, try to bring him players, and give him the project. If it doesn’t work, it doesn’t work. But he took the team from low and put the team back into the Champions League.”Hernandez also shed light on his 2015 departure from United, disclosing that he felt the club had transformed following the exits of Sir Alex Ferguson and David Gill in 2013.”It was very hard. Because if you gave me the chance to stay at United for most of my career, I would have taken it. The team that I played the most games for, even more than my hometown team in Mexico, is United,” he said.”I would have taken a bullet for that team. It’s my team, Manchester United. But things weren’t the same. It’s not that I left the club that I was with; I left a different environment. It was