I defended the Muslims earlier in a different thread, so I am not anti-Muslim. But at the same time, it is necessary to be fair. There is nothing in the 4 Gospels, in the present Bible, that I’m aware of that contradicts the Quran. In my opinion, the four Gospels are pretty like hadiths. Are the Gospels 100% accurate? No, but neither are the 2 most authentic hadith collections Bukhari and Muslim 100% accurate. If there are reasons for you to doubt the Gospels, there is reasons for me to doubt Bukhari and Muslim. Jesus did not leave a revelation like the Quran or the Torah. But rather Jesus left the Holy Spirit (or properly stated, he encouraged his followers to access God directly through the Holy Spirit.)
It is also necessary that you as a Muslim that, just because there is similar terminology doesn’t mean, it is exactly the same. Holy Spirit, for example. Based on my research, it doesn’t appear that Holy Spirit in Christianity is the same thing as Holy Spirit in Islam. Same title, but represent two different things.
The Holy Spirit in Islam is the Angel Gabriel.
The Holy Spirit in Christianity is NOT the Angel Gabriel but rather refers to the Old Testament Sakhinah.
Thus when Christians speak of the Holy Spirit, they are referring to sakīnah, in Arabic, which is mentioned in the Quran 6 times.
So the Holy Spirit in Christianity, refers to Sakinah in Islam.
Ali said about Saiknah, “Sakinah is a sweet breeze/wind, whose face is like the face of a human”. (Al Tafsir Al Qurtubi)
Mujahid mentions that “when Sakinah glanced at an enemy, they were defeated” (Tafsir al Qurtubi).
In the context of Sunni Islam, To better under Sakinah and its relation to the Holy Spirit as understood by Christians. It is necessary to understand the difference between, Wahy (Revelation) and Ilham (Inspiration). Both are from Allah (God). Wahy is for Prophets and Ilham is for non-Prophets.
Here is an explanation of the difference between Wahy and Ilham.
baraka.wordpress.com/2013/05/19/119/
Perhaps this will give you a better understanding of Holy Spirit as understood by Christians.