Did Constantine the Great toll the bell for the end of true followers of the Christ?

[Farsight]

I don't really see how
1 - legalizing Christianity
2 - requesting the gathering of the first church council to help end fighting and bickering
3 - converting on his death bed
could have had any negative effect on Christianity.

Constantine's impact on Christianity is much exaggerated among the general public.

 

[Lone Dissenter again]

And bring in the rein of false Christians ?