As a former christian you should be aware not only of the historical horrors carried out in the name of Christ but also the horrors being carried out today, justified by people holding a bible above their heads. The god of islam is very much the god of the old testament. The reasons you don't fear the average jew/christian are exactly the same reasons as to why you shouldn't fear the average muslim. Yes the religion teaches some fucked up shit, but the average believer is better than their god. I guarantee that the last muslim you met didn't leave that conversation thinking "Kill the kaffir" any more than the last christian you met didn't walk away thinking "Crucify the apostate".
Bashing muslims purely for being muslims isn't something tolerated on this site, and for good reason, which you seem to be aware of, however your comment "opposed to a Muslim who might not be telling me the truth" brings up red flags for me, as I'm sure it will others. You're not one of those who think taqiyya is a real thing for all muslims as dictated by the Spencer/Geller types are you? I hope not.
Criticising texts and individuals, is fine, and I hope you have a good time doing it, but I do feel the need to ask your thoughts on muslims in general.
Apart from that, welcome.