Is it ok for a christian to like these bands?

YES YES YES! lol sorry, but yeah, don't let your religion limit your life. Christianty should be mainly about you and your relationship with God. First of all none of those bands are bad. P.O.D is a christian band. Idk who Dead by Sunrise is, but yeah...most music I hear doesn't influence me, so if you listen to stuff about doing bad things?, I guess it's ok as long as you don't start doing them.