I am glad you agree, of one does not need faith in all areas to be saved, Lack of faith in a few areas does not disqualify us from being Gods people.
I am not sure if I understood you right on this last part, , So will not assume, Just tell you what I think.
I think via the cross. God through the line, We are all or at least we were) drowning in our sin and debt, And God sent us a life preserver,
But he will not force people to take it, Those who have faith will. Those who do not will not.
The world is throwing you a line to, Its leader is satan Some grab that line, because they want it more than Gods line, and they have more faith in that line.
Sadly, most of the worlds religions, including many sects of Christianity, Have grabbed on this line thinking it is Gods line, and will get a surprise one day when they realize they grabbed the wrong line.
This is where we separate. I do not think God gives people a reason to lose faith, or to lose hope. Only the world can offer you a hope that is not hope that is weak and unable to give you what it promises,, These people keep looking for hope they can not find.. Some find it in religion. Some think they have found it in some form of Christianity, But they never trusted it, These people will not last, they will walk away, Not because they lost hope. but because they never took hold and grabbed hold of the hope God offers.
then I think their are some who want to hold on to the worlds rope and Gods,, They will drown in there sin because they did not take proper Hold of Gods rope. and they slipped and fell and perished.
To me it is the most important, Getting this part wrong has eternal consequences.
I think you have, I hope you see now why I believe the way I do concerning faith and Hope.