Let me preface this by saying that no two atheists are alike and there are even religious atheists. That said let us examine these sayings together.
Here is the list.
1. If you were born in India, you would've been a Hindu!
Statistically speaking (but not universally) religion belief is determined by the group you were born into. The correct way to say this would be if you were born in India the chances of your being a hindu would be far higher and your chances of being christian would be far smaller.
2. Hitler was a Christian!
Hitlers actual internal beliefs aside he did quote and use politically many pieces of christian dogma in his efforts to conquer Europe and enact genocide. The correct way to day this would be Hitler espoused many christian ideas.
3. Bible promotes rape, slavery, and killing!
Some passages of the bible normalize condone or even command these acts. That being said the bible is often self contradictory and some passages could be interpreted as prohibitive of at least one of these acts.
Language is meant only to convey an idea. I prefer to use more precise terminology such as some god(s) as it is more inclusive of the various theistic ideas I have encountered but if you understand the meaning of the designation "sky daddy" then the phrase serves its purpose. I'm not sure there is a right or wrong with this but it would be nice if a less narrow term could be used.
This of course depends on the god(s) under discussion but as atheists by definition do not believe in god this is an inaccurate way of expressing their opinion. The correct way to say this (providing it even matches with a given atheist's opinion on the subject) is the hypothetical god we are discussing would seem to commit and or condone acts that I consider immoral.
6. Religious people are less intelligent!
Intelligence is notoriously difficult to measure in a meaningful way. The more correct way of saying this is that on some tests meant to measure human intelligence theists tend to have statistically lower scores.
7. Religion is a delusion!
I'm not sure what to say about this. Religion and delusion are far from mutually exclusive but they are not the same thing. There is no correct way to say this.
8. It's writing in black and white!
I'm uncertain what you mean here. Or rather what the hypothetical atheists you are strawmanning here mean. Do you mean that the bible is clear? I do not make that claim. I find it is in fact very difficult to pin down exactly what the bible means in many instances and partly because it seems to have many different authors who had different things to say and where coming from different historical contexts.
This is a claim and so would require a burden of proof. The more correct way of saying this would be there is no evidence that Jesus was a historical figure or that many of the stories regarding his life and exploits would seem to be mythologized in much the same way we have developed mythologies regarding George Washington.
10. Christians have killed people!
I mean technically true but it is difficult to find such a diverse demographic of people for whom this is not true. Also it is unclear what this has to do with the truth value of any christian claim might be unless the claim where no christian kills anyone ever which is not a claim I hear from Christian's often.