Creationists have harmed the Gospel by putting in requirements for salvation (or at least making it appear like there are requirements) beyond the Gospel
Creationism is apostasy <=== You mean like requiring that they believe what you do in order for them to pass muster?
Fo-foe, my very first interaction with you revolved around removing the plank from your own eye. You haven't made any progress.
Hmmmm... maybe you shouldn't talk, seeing how you are attempting to attack the man rather than offerring any coherent arguments other than misinterpretations of Scripture.