There appears to be a lot of similar kind of good wisdom within all the various religious scriptures do you think it all came basicly rom the same source?

Yes. But I do not think it means there is a common Divine source for it. Instead I think there is a common human source for it.

"The (human ) mind is everything " according to Buddha

"What you think you become ". -no divine source required for wisdom.

Believing in 'God inspired ' material just seems to mess things up for mankind.

That, KG, is precisely the Islamic, and logical, perspective.

1- Common sense tells us that IF there is a God and He cares for the guidance of His creation then He would not have waited till Moses, or Jesus or Mohammed was born to give people guidance. So Muslims believe that ALL peoples who ever lived, wherever they were, DID HAVE guidance from God, and that Noah, Abraham, Moses, Jesus and Mohammed were just a few greats among the huge number of conveyors of guidance from God.

2- Again if we use common sense then a caring God would not confuse His creation by giving them different guidance [religions]. So here again Muslims believe that all religions that came from God carried the same essential core message-

a] that God is one,

b] that as the creator He knows best about His creation, and

c] that if people persevere and do His will [follow His guidance] then they will lead a successful life in the here and be rewarded in the hereafter. Muslims believe that the added on details of each guidance were tailored to suit the people, their time in history and their levels of knowledge and understanding.

3- Muslims further believe that as each guide passed away the guidance he left behind slowly got irrelevant, got lost or got corrupted, and that God updated His guidance to keep pace with the needs and development of mankind. For example, when, after Moses, the Jews started straying away from the true guidance, God sent Jesus to bring back onto the right way to God “the lost sheep of the house of Israel” to use the words of Jesus himself

yep

but then each Religion built 

a little house around it

to suit their thoughts

...Each losing some essence in the translation.

I think any inspirational thought can originate from the mind of mankind which can produce material suitable for religious scriptures. I do not feel convinced any scriptures must need a supernatural source.
There are many 'inspired' authors of some great works of literature as well as 'inspired' scientists and inventors.

Seems quite right.