<text>  Jose Mourinhos son has labelled Chelsea fans a disgrace and the worst hes ever seen after they booed Cesc Fabregas during Sundays 1-1 draw with Southampton. Jose Mario, 15, a goalkeeper at Fulham, defended the Spanish midfielder and insisted he did not deserve to be singled out for criticism. Fabregas has struggled to hit the heights he set during the first half of the season when he made 13 assists and Jose Mario claimed supporters were on his back on Sunday. Jose Mario Mourinho left, watching a game last season and with his dad has criticised Chelsea fans . Jose Mario celebrates winning Chelseas Capital One Cup victory with some of the players . Jose Mario took to Instagram to criticise Chelseas fans before deleting his account . Jose Mario stands up behind the Chelsea dugout as he watches the team play Manchester City in 2013 . Cesc Fabregas was booed by some Chelsea fans during Sundays draw with Southampton at Stamford Bridge . The 27-year-old has not scored or assisted a goal in his last 10 games in all competitions and the last goal he made was against Swansea on January 17. But Jose Mario, who is regularly seen at Stamford Bridge supporting the team and celebrated on the Wembley pitch with players after Chelsea won the Capital One Cup earlier this month, wrote on Instagram: Why is everyone hating and blaming Fabregas for Sundays performance... It was a team effort. Fabregas might have not played as well as most expected but at least he kept fighting... Showed a lot of character, Ive seen bad Chelsea fans but Sunday was the worse Ive ever seen, Fans booing Cesc not singing at all, I completely agree with the chant Mourinhos right, youre fans are s Our fans are a disgrace!!! Fabregas right has come in for criticism from supporters in recent weeks after a dip in form . Jose Mario tells one Instagram user that the clubs young players are not ready to play in the Premier League . Mourinho with his wife Matilde Faria . Responding to comments left by other Instagram users, Jose Maria also wrote that: . Responding to two users criticism, Jose Maria wrote: Ill show the fans some respect, when the fans respect the team. To another user, he wrote: Who has been scoring goals??? Iva... Willian he is just having a bad time, every player has that doesnt mean you can boo them and put their momentum down... Oscar, he hasnt done anything wrong, please elaborate, cuz I dont see anything wrong with him. To the same user, he also wrote: Thats why every single staff of Chelsea hate Chelsea fans!! Oscar has created a lot of our chances... Willian and Ivanovic are probably the players who track back the most they dont stop running Ivanovic has saved us this season, scored so many goals and helped beat Liverpool with their sy youngsters... Willian put the cross in... You need to remember who you are talk to and realise I know a lot more than you. And in a third exchange with the same user, he added: Does it look like any of our youth are good enough to play in the best league in the world... No they are too young too weak... if fans kept supporting Fabregas he could change his mind set, booing him wont make him better at all. Jose Maria has since deleted his Instagram account. Chelsea refused to comment when approached by Sportsmail on two occasions. Jose Maria is following in his dads footsteps in criticising Chelseas fans. At the end of last year, Mourinho was unhappy at the support his side were receiving at Stamford Bridge. Speaking in November, Mourinho said: I can clearly say we are the team to get less support in home matches. I think its getting worse. When comparing to my previous time, I think its getting worse. I dont question the passion and the love Im nobody to question that and I know clearly thats not true. Chelsea fans show us their passion for this club every day, but there is a certain line of living way of behaving at the matches at Stamford Bridge. Jose Mario also claims all Chelsea staff hate Chelsea fans and tells him to listen to his views . Jose Mario claims he will respect the Chelsea fans when they respect the team . Jose Mourinho left shouts instructions at his players during Sundays draw with Southampton . 