"Whoever doesn't think like you is unintelligent?" - Not always, but sometimes. Also, one can be ignorant in certain areas and brilliant in others. Again, intelligence is hard to define. Yet, generally speaking, someone who believes talking pink elephants exist very likely does not have the same intelligence as an atheist. Likewise, anyone that denies climate change, relies on Ayn Rand or Paul Ryan for economic theories, and/or believes our morals came from religion is practically begging people not to take them seriously. When things like evolution are being disputed by an individual, I'm sorry, but I definitely assume said person is of lesser intelligence. Certain beliefs cannot be held by a rational, logical mind. This does not mean that there is never a time of disagreement that doesn't equate one person as the intellectual inferior/superior to another. There are areas where it is absolutely fine to have disagreements, but only when the facts are ambiguous; not when they are all but concrete in one direction only. So, people are not stupid for having different perceptions of the world, but they are ignorant, in one way or another, if the cannot allow themselves to be objective.
And I answered your suicide question already. I told you, I'm completely indifferent. I don't view it as a "vice" at all, because it's not "wicked or immoral". Yet, it's not something I would celebrate either, so it's not a "virtue". It's really just a personal choice, i guess. Nobody knows what another individual deals with mentally, so I'm not the type to judge. Still, I feel that majority of the time, those depressed feelings and thoughts will subside some (at least the severity) over time, so I'd hate for someone to kill themselves over what was just a phase.