"distorting effect" means something that changes or alters the true nature or appearance of something. It can make things look different from how they really are or exaggerate certain aspects. Full definition
As Poggi says, it's «another sign of the contentious political environment, not just for politicians but for marketers as well, not to mention the amplifying and sometimes distorting effects of social media.» (adage.com)
The more the preacher is lacking in self - awareness, the more he will project unconscious feelings and images through the sermon, with distorting effects on the Christian message. (religion-online.org)
One of these meanings has become dominant in the modern period, with distorting effects on the Christian life. (religion-online.org)