I have often said that if I could no longer be a Christian, I would have to be an Agnostic. I couldn't be an atheist, because atheism requires omniscience. But there are no other gods I am aware of that even hold a wickless candle to God. Therefore, I would have to be an Agnostic. Nevertheless, one criticism I have of Agnosticism is its general attitude that confidence is arrogance.
Of course, Agnosticism itself is not a fixed philosophy. Agnostics have no common doctrines, no rule books, nothing to bind one Agnostic to another, with one exception: They don't claim to know God. Thus, this isn't a criticism of all Agnostics. However, many Agnostics, and indeed many people in general, would look upon those who do claim to know God and call them arrogant for that.
In its most irritating form, this attitude results in a certain hostility towards outreach efforts. As a Christian, I believe in God. As a critical thinker, I have reason to believe in God. As an apologist, it is my job to give those reasons, as well as respond to attacks on my faith. Given the particular nature of my faith, all of that makes sense. I believe this world matters, because what happens here will have short and long term effects.
But such preaching is seen as arrogance. In an Agnostic's eyes, you cannot know Christianity is true, and thus should not preach it. The irony never seems to dawn on these people. See, in order to claim I don't know Christianity is true, first, they have to assume it isn't, because Jesus promises we will know the truth, and the truth will set us free (John 8:32). But if you can't know if Christianity is true, then you can't know that it isn't, which therefore means you must be able to know!
Furthermore, is it not particularly arrogant to assume "if I don't know, neither do you?" Is that not effectively claiming to know the most of any human on the planet? If a Christian said such things, you can be sure we'd see them as arrogant. Indeed, just last night, I was watching The Essex Serpent, and Samuel, the antagonistic Curate of the church, was angry that Cora, the protagonist, told his class about "living fossils", because "then why have I never heard of them?" So why is it ok for an Agnostic to say that if they don't know who God is, no one does?
On top of this, of course, apologists give reason for our beliefs. We don't just run around saying "there is a God, drop everything and repent!" No, we say "here's this evidence, here's that philosophical argument, here's the flaw in this reason to reject Christianity" etc. And of course, the more skilled the apologist, the more reasonable Christianity becomes. Yet along comes this Agnostic to tell these apologists "you don't know that, stop preaching this because you can't be sure it's true". Are they providing alternatives? Do they respond with contrary reasoning? No, it's just a constant assault on faith.
It's actually a form of arrogance against God. People hate good Christian apologetics not because it's actually wrong or haughty, but because they don't like their confidence being shaken. What are they confident about? Could be anything. It could simply be that there is no God. It could be that if there is a God, He approves of them, and will not call their sin to account. It could even be that their particular idea of God loves them so much, they'll be the first people in the Kingdom. What their confidence is in depends on the person.
But if there is a God, and in particular if that God is the God of the Bible, you could not answer Him one time out of a thousand. Is it not the height of arrogance, therefore, to impede His messengers? If you don't know the truth, then how do you know you aren't impeding it? If you so struggle to answer His heavily flawed messengers (and we are heavily flawed), why would you imagine you could plead your case on judgement day? You cannot plead it... alone.
The God we preach to you, you may not like, because His justice is contrary to you. As sinners, we have all gone our own unGodly ways, and as a result, God owes us a punishment none of us can bear. Of course that's not a pleasant message. It hurts our pride to be told our way is wrong, and sears it beyond measure to tell us this will end horribly for us. Nevertheless, this same God loves you so much that He does not want to punish you for a single one of your sins. Therefore, He sent His Son, Jesus, to live a perfect human life, being tempted in all ways as we are, yet without sin. Still, Jesus died, suffering the full wrath of God for sin. This makes way for a substitution. As God punished Jesus for sins He didn't commit, He can reward you for righteousness He did. All you have to do to receive this gift is confess Jesus as Lord, and believe He rose from the dead. It boggles my mind that people would argue against a God so humble by accusing those who believe in Him of arrogance.