Harilal Gandhi renounced ties with his family in 1911 and converted to Islam
after 25 years in 1936. Please know what you are talking about first.
Regarding the incident, in Gandhi own words to his other son Ramda Gandhi, "Just read in the paper about Harilal's exploit. There could be no harm in his being converted to Islam with understanding and selfless motives. But he suffers from greed for wealth and sensual pleasures. I shall be spared all mental pain if I find my impression wrong and he turns a new leaf.."
@Aether Let me apologize on his behalf.