Following forbidden things - a type of idolatry
أَرَأَيْتَ مَنِ اتَّخَذَ إِلَـٰهَهُ هَوَاهُ (Tell me about the one who has taken his desire as his god - Al-Furqan 25:43 ⧉). The one who practises forbidden things which are against the tenets of Islam to satisfy his personal desires is described in this verse Al-Furqan 25:43 ⧉ as the worshiper of his own lust. Sayyidna Ibn ` Abbas ؓ said that the selfish desires are like an idol which is worshipped (by the infidels) and then he recited this verse Al-Furqan 25:43 ⧉ to prove his point. (Qurtubi)