Religion is an evolutionary tendency that has spread rampantly through the human gene pool and needs to be exterminated as quickly as possible. It is the enemy of reason. It's an excuse for people to murder, torture, ****, and do unspeakable things to each other.
That isn't an entirely fair statement, given that not all "Religions" necessarily promote those things. Rather than saying "religion", it would be more fair to say "any ideology that promotes ****, murder, etc". There are religions that meet that criteria, but not all of them do.
That said, I strongly object to religion in general simply because religion engenders a respect for "Faith"; religion presents "Faith" as if it were something to be respected or admired, when in reality "Faith" is a useless, flawed, and dangerous (yes, dangerous) idea that should be scorned by all logical people. Religion presents "Faith" as if it were a valid source of justification for claims to truth, when it is not. What's more, religion promotes "Faith" as something that should be respected and unquestionable.
The big problem with this is that "Faith" is not a valid source of justification, and accepting it as such is wrong and dangerous, for multiple reasons.
First, the acceptance of "Faith" as a valid source of justification results in logical contradictions. This is because "Faith" can be used to justify
any claim to truth or falsity, which means that accepting "Faith" as a valid form of justification
necessarily entails the acceptance of all claims as being both true and false simultaneously, which is obviously completely nonsensical. (In other words, it results in Trivialism.)
Second, "Faith" is based on ignorance. "Faith" is belief in something without any justification for that belief; in other words, "Faith" is belief without understanding or questioning why you believe. This means that "Faith" is belief based on ignorance. You believe something, and your justification for that belief is ignorance. Ignorance is not a valid source of justification, so the problem here should be apparent.
Third, acceptance of "Faith" results in the *********** of societal progress and it encourages complacency and acceptance of ignorance.
With "Faith":
--Why do people get cancer? Well, God does it, and I have "Faith" that God will cure them if that is his Will. We don't need to understand, just have "Faith". God will take care of us.
Result: Zero advancement of human knowledge and zero improvement in the human condition.
Without "Faith":
--Why do people get cancer? Huh, I don't know; let's try to figure it out. Maybe we'll be able to cure it.
Result: A cure for cancer.
With "Faith":
--Where did the universe come from? God did it. Have "Faith".
Result: Zero advancement of human knowledge and zero improvement in the human condition.
Without "Faith":
--Where did the universe come from? That's a pretty daunting question, and it'll take a long time before we can really answer it. We'll never know until we look though, so let's get started. Hey look, we found out that the universe is governed by certain physical laws that can be represented mathematically. Perhaps we can extrapolate from them and figure out how everything started? We don't know enough yet though, so let's keep looking. Hey look, "insert every discovery ever made in Physics". Interesting, as far as we can tell there was this thing called the "Big Bang", but there are still some unanswered questions about it. Let's try to figure it out.
Result: Physics as we know it, modern technology, and an unbelievable improvement to human living conditions worldwide.
And so forth. You get the idea.
Finally, "Faith" is presented as a "Shield" against criticism. It's somewhat akin to when someone says something incoherent without thinking it through first and then tries to cover their mistake by saying "Well that's just my opinion!", as if that makes their foolish comment somehow less foolish. Similarly, if someone believes something illogical "on Faith", we are supposed to respect their incoherent idea because it is "Sacred" and "based on Faith", even if we would normally dismiss it completely due to its obvious flaws. When a Fundie says "The Earth is 6,000 years old" we're supposed to respect their absurd idea because it is "based on Faith", regardless of all the evidence we have against the claim.
Moreover, if a religion encourages ****** children, stoning people to death in the streets, and slavery, we're supposed to respect those ideals because they are "based on Faith" and "Sacred". If someone believes something "on Faith", that belief should be immune to criticism or judgment, regardless of how incoherent, ridiculous, evil, or horrifying it may be. No matter how sickening and vile an idea may be, it is A-Okay as long as it is "based on Faith", and it should be immune to criticism.
The problem here is that, again, "Faith" is a not a valid form of justification. Therefore, it also isn't a valid excuse. If you say something that is incoherent, or you believe something that is incoherent, then you are accountable for your poor judgment. If you do something evil or believe something evil, then you are accountable for your evil. "Faith" does
not justify your actions or beliefs and it certainly doesn't alleviate you of responsibility for them.