Christians are a bunch of heretics going around killing other religions

Some people are against Christianity because of this reason. An example quoted are the crusades killing Muslims and Jews in the name of claiming back Jerusalem the holy city for pilgrims. Yup I'll totally agree that its disgusting.

However implicit in that statement is a factual error. We ignore the fact that atheists has killed many more. Stalin has killed 50 millions in the name of socialism. Hitler has ordered exterminations of Jews in the name of "The Final Solution". The Germans at that time were the most educated amongst nations, are we then to say that they're a bunch of Jew killing intellectuals?

We should not judge a philosophy by its abuse.

Guilt

We've all done something wrong in our lives. You know, those things that you've done that results in guilty pangs in your heart. Guilt is a powerful emotion that God has implanted in our souls to alert us of right and wrong. The problem with sin is that it tends to lead us to do one of the following:

1) Expelling guilt by irreverence

You know that you're feeling bad but you concluded in your mind that it's just a feeling and morality's relative. You put God out of the picture by disbelieving the His commandments or worst, believing but ignoring it altogether.

2) Smothering guilt with pride

You know you've hurt someone but your pride keeps you from admitting that you're wrong so in order to counter that you need a scapegoat; You'll start blaming others for the wrongdoings and shifted responsibilities away from yourself.

3) Concealing guilt with fear

You're confronted with the notion that someone's gonna find out about the wrong things that you've done. Fear suddenly grips you and you find yourself lying about the situation, hoping that paper-thin walls of lies can maneuver people away from the truth.