I have heard that any Christian who hears the Truth/Message/Signs of islam but denies it is punished by Allah! Content ive read that may be connected to this are how Islam means submission, Allah is the only god, Jesus wasnt son of god, god himself nor crucified and the context of violent verses. I still believe Jesus was gods son & crucified but im undecided on the Trinity theory. And I also havent read about the evidence to these messages. Plus I haven't read the Hadiths. Does this still mean that I will still be sent to hell if islam is the true religion?
It's very difficult to answer this question but i'll try.
Rejecting Islam when you heard about it means you rejected what Allah said and asked you to believe about.
So you can end in Hell for that.
Imagine someone heard the message of Jesus but rejected it. It's like he rejected God because Jesus came with God's message.
But if you are a (good) christian and the message of Islam came in a distorted way then it's not your fault.
You will be judged according to your faith.
Let say you haven't had the chance to read the Quran or meet (good) muslims then the religion correct for you is Christianity and God will judge you according to this faith.
The fact that you believe Jesus was crucified won't lead you to Hell.
You can believe that Isaac was the sacrified son too, it won't lead you to Hell.
It's ok because you believe in your Book and that's what your Book said.
Believing that Allah had a son is a big sin, and believing that Jesus is God is like polytheism.
Those beliefs are not teachings of Jesus, it's wrong interpretations from the Church.
It's true that Christians are still called "People of the Book" even with this belief but i think it's because of the core of the religion.
There's a confusion because of the Trinity's teaching but the "base" (Scriptures) is good.
As a muslim i would say there's a big risk to end in Hell but i can't say you'll be in Hell for sure because i am not God.
Remember that the unforgivable sin is giving partners to God (polytheism).
In Islam asking help (praying) to someone else that God is "shirk" (association).
So praying Jesus, Mary, Joseph or mother Theresa is all the same.
By the way there's muslims who also go in some tombs and pray(ask help) to prophets and saints, this is shirk and they end in the same sin as christians. So they also risk Hell (even if they believe in the Quran).