I believe that the following passage explains how other religions came to exist and how God feels about the people caught up in those other religions.
Romans 1:18-23New King James Version (NKJV)
[SUP]
18 [/SUP]For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who suppress the truth in unrighteousness, [SUP]19 [/SUP]because what may be known of God is manifest in them, for God has shown it to them. [SUP]20 [/SUP]For since the creation of the world His invisible attributes are clearly seen, being understood by the things that are made, even His eternal power and Godhead, so that they are without excuse, [SUP]21 [/SUP]because, although they knew God, they did not glorify Him as God, nor were thankful, but became futile in their thoughts, and their foolish hearts were darkened. [SUP]22 [/SUP]Professing to be wise, they became fools, [SUP]23 [/SUP]and changed the glory of the incorruptible God into an image made like corruptible man—and birds and four-footed animals and creeping things.
God's testimony is written into creation in such a way that no one is without excuse. The fact that so many have seen these attributes of God in creation and made up their own stories and their own idols is evidence that God's invisible attributes are there to be seen by all. Jesus is the only way and His sheep recognize His voice and come to Him.