step-father was a very religious, bible-thumping, violent alcoholic, who made hating religious people easy.
I think being a violent alcoholic would kind of make him not a Christian, although am I understand you correctly that:
1. You met a someone who claimed to be Christian
2. This person was bad
Therefore
All Christians are bad3. Christians can be hypocrites and being Christian doesn't automatically make one a good personn
4. A lot of Christians are hypocrites
5. OMG A WHOLE LOT of Christians are hypocrites and just downright assholes. Especially ones in power.
6. Being a christian does apparently make you somewhat of a hypocrite, and it's possible to use christianity as an excuse to be an asshole.