Why does he believe in Satan?

Okay number 1.. WTF IS WITH YOU PPL SATAN IS A BUTTHOLE!! number two... you should just tell your friend the differences between satan and God... also... satan doesnt give "love"... so when he says love for the devil...the devil has NO LOVE at all ... also tell your friend that the devil will just betray him.. he cant be trusted lol God is love .. if he wants love he should go back to God. and he just depressed thats why he has turned from God, Yeah santanist are rude and weird lol well i think they are... im just sayin:D