Gurfateh
Bhagat Singh was from Arya Samaji Family and as it happend with people with too much logic(Say Kala Afghanism in us) he lost his faith.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/hard-talk/8786-bhagat-singh.html
He made *******y of communism and wrong nationalism as per Lala Lajpat Rai.
As Arya Saamjis controled meadi so he got more publicity and prave men like Madan Lal Dhingra,Moro Panth Pngle ,Baber Akalis and Ghadrites were put behind.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=8786
In futre we will know more turth that at the time of his death he rgrow his hairs on instanc eof Bhai Randheer Singh Ji but even then such person can not be a role model as he was comunisit.