Adding to Smiley's post(in this page) with regards to jealous and vindictiveness on account of nonworship or competetive worship.
004.048
: Allah forgiveth not that partners should be set up with Him; but He forgiveth anything else, to whom He pleaseth; to set up partners with Allah is to devise a sin Most heinous indeed.
004.116
: Allah forgiveth not (The sin of) joining other gods with Him; but He forgiveth whom He pleaseth other sins than this: one who joins other gods with Allah, Hath strayed far, far away (from the right).
025.068 : Those who invoke not, with Allah, any other god, nor slay such life as Allah has made sacred except for just cause, nor commit fornication; - and any that does this (not only) meets punishment.
continuation of 68
025.069 : (But) the Penalty on the Day of Judgment will be doubled to him, and he will dwell therein in ignominy,-