I seem to be getting mixed messages about Catholics opinions on Islam.
questions
1] do Muslims worship the same god as Catholics the god of the bible?
Yes, but there are vast differences in our understanding of that nature and essence of that God. He is however the God of Abraham to all of us. Most responding to this question jump right to the idea that if our understanding is so different about his Nature that he must be a different God, but he is definitely one in the same if our Abraham is the same as their Abraham.
2] Is Islam a religion of peace to be accepted, or should we preach the gospel to them as well and look to convert?
We are called to spread the Gospel so regardless of whether Islam is a religion of peace or not we are not to accept it. Like Protestantism, Islam lacks a single “head” of the faith or vicar on earth and as such is just as lacking in unity as the 50,000 protestant denominations. The result is killing between the sects, Sunni/shia etc. Then given the extremist factions who have as much right to call themselves Muslims as any other sect I think its safe to say that Islam is not a religion of peace but that doesn’t mean it can’t be.
3] Is Islam true? or does it have parts of truth in it?
No, God is truth and he established his Church in Christ Jesus so Islam can’t be true.
4] Why did the church call crusades against Islam before, yet seems to accept them today?