Your post seems to contradict itself in that the word is ‘disbeliever’, which you provided the translations for, and among those translations is ‘infidel’.
What you may fail to realize is, ‘Trinity’ is God the Father, the Son and the Holy Spirit…ONE God.
77 Say (O Muhammad SAW): “O people of the Scripture (Jews and Christians)! Exceed not the limits in your religion (by believing in something) other than the truth, and do not follow the vain desires of people who went astray in times gone by, and who misled many, and strayed (themselves) from the Right Path.”
78 Those among the Children of Israel who disbelieved were cursed by the tongue of Dawood (David) and Iesa (Jesus), son of Maryam (Mary). That was because they disobeyed (Allah and the Messengers) and were ever transgressing beyond bounds.
79 They used not to forbid one another from the Munkar (wrong, evildoing, sins, polytheism, disbelief, etc.) which they committed. Vile indeed was what they used to do.
80 You see many of them taking the disbelievers as their Auliya (protectors and helpers). Evil indeed is that which their ownselves have sent forward before them, for that (reason) Allahs Wrath fell upon them and in torment they will abide.
81 And had they believed in Allah, and in the Prophet (Muhammad SAW) and in what has been revealed to him, never would they have taken them (the disbelievers) as Auliya (protectors and helpers), but many of them are the Fasiqoon (rebellious, disobedient to Allah).
82 Verily, you will find the strongest among men in enmity to the believers (Muslims) the Jews and those who are Al-Mushrikoon (see V.2:105), and you will find the nearest in love to the believers (Muslims) those who say: “We are Christians.” That is because amongst them are priests and monks, and they are not proud.
83 And when they (who call themselves Christians) listen to what has been sent down to the Messenger (Muhammad SAW), you see their eyes overflowing with tears because of the truth they have recognised. They say: "Our Lord! We believe; so write us down among the witnesses.
84 “And why should we not believe in Allah and in that which has come to us of the truth (Islamic Monotheism)? And we wish that our Lord will admit us (in Paradise on the Day of Resurrection) along with the righteous people (Prophet Muhammad SAW and his Companions).”
85 So because of what they said, Allah rewarded them Gardens under which rivers flow (in Paradise), they will abide therein forever. Such is the reward of gooddoers.
86 But those who disbelieved and belied Our Ayat (proofs, evidences, verses, lessons, signs, revelations, etc.), they shall be the dwellers of the (Hell) Fire.
Religion do deny each other. Both of our religions go back to the God of Abraham. It is still ONE God. Just as you do not believe Jesus was the Son of God, we don’t believe in your prophet. God did not divide.
