Abu Hurairah (RAA) said that the Messenger of Allah (SAW) said: “Riba is of seventy different kinds, the least grave being equivalent to a man marrying (i.e., having sexual intercourse with) his own mother.” (Ibn Majah, Baihaqi) having intercourse with your mother is more dangerous and a greater sin the homosexuality with no shadow of a doubt Allah promises a war with those who deal with Riba that he had not done on any other sin including murder,zina and homosexuality And if you do not, then be informed of a war [against you] from Allah and His Messenger. But if you repent, you may have your principal - [thus] you do no wrong, nor are you wronged.2:279 I think very clear the Riba is a greater sin than homosuality without a shed of a doubt although it my not like it on your eyes but in the sight of Allah it is.