Apologist

[Sarah]

One who makes an apology; one who speaks or writes in defenseof a faith, a cause, or an institution; especially, one who argues indefense of Christianity.

[Sarah]

One of those annoying douches who apologizes before saying something horribly offensive, ignorant, or demeaning to you. The apology is supposed to make it nicer somehow--or they're attempting to be PC (which is annoying as well).

These type of people also lose credibility on their beliefs since it conveys less confidence about their beliefs.

[Sarah]

An apologist is someone who argues in defense of a controversial truth, usually but not always associated with Christianity.

[Rihanna]

A person who offers an argument in defence of something controversial.