so why wasn't the first baby enough to keep him clean?
his "rationale" makes zero sense. except that it would be much harder for you to leave him saddled with a second kid. people that truly WANT to change, that can SEE the wreckage they are causing, will get themselves into recovery NOW, not when >>fill in the blank<< happens.
the raging at you is very concerning. and that he is not able to restrain his rage when the child is around. that makes the home-life fear based. he also shows no respect for ensuring the child's safety by not leaving his drug stuff around.
i'm afraid this is not going to get any better unless something drastic happens or changes.