That's the church I used to go to. I have since understood that the methodologies and theology behind it are not biblical. Please look through the book of Acts and see what message they preached and what was told of them to do.
'Repent(turn from your sins) and believe the Gospel' and not 'repeat this prayer after me and accept Jesus.'
"let him be the Christ"
He is the Christ already, you don't have to let Him be anything but to submit to Him.
"payed for the sin of everyone in he whole world"
If this were true then no one would be in hell, for Christ would have even died for their sin of disbelief.