Christian morality is particularly unpopular these days. When you preach Jesus, you're guaranteed to receive all sorts of comments from both unbelievers and liberal Christians(?) alike. There are a range of excuses they give for why they think God's commands are unfair, or why they think their way works better.
Of course, their arguments are always flawed in several critical ways, so it's easy to defend the Biblical view (as long as you can get a word in edgewise, which in my experience is difficult to do), but the truth is, you don't need to. See, even if you are able to convince your Liberal friend that a divine command they previously disagreed with is better than what they previously believed, there will still be plenty of objections they have to other areas. You won't have convinced them of much. You could think of it as trying to cut down a tree leaf by leaf. You'll be there all day, and even with the leaves gone, the tree still stands. But if you go for the trunk, the tree falls.
Here's the trunk: No matter how much you whine at me, there is nothing I can do to alter God's laws. Even if you could convince me your way is better (which, at this point, I have definitely learned will never be the case), I won't be the one judging you on judgement day. In fact, isn't that what you're always squawking about? "Only God can judge me", "judge not lest ye be judged", "judge righteous judgement", wait, no, that last one is one of the ones they like to ignore...
Anyway, you get the point. You can't insist I avoid judging you, yet at the same time demand I judge you by a standard I have no authority to judge you by. It's not going to be me you face on judgement day, and you all know it. When we're all dead, and on the other side of that void, we'll stand before God and be judged by the very standard you complain about.
Imagine the scenario. Two citizens are arguing about the law of their land. One of them has 6 points on his driving license, the other is sat in front of the police station smoking weed (we'll say this is in England, where at least at the time I am writing this, weed is still illegal). The 6 pointer tells the smoker the weed is illegal. Tell me, what good would it do for the smoker to rant about how weed should be legal? Is that going to stop the police officer coming out and arresting the smoker? Will reminding the 6 pointer that he's also broken the law shave a single penny off the fine the smoker will receive as a result? Is it unloving for the 6 pointer to warn the smoker that the police officer is literally walking towards them as they speak?
NO!
The obvious answer is absolutely no. The biggest difference is that at least if you could convince a citizen weed legalisation is a good idea, they might start voting for it, which might pave the way for legalisation. But who votes for God? No one. He was the first and final authority before He even pronounced the words "let there be light". His laws are not up for debate. The problem is, we've all broken them. And we will stand before Him. So, which defence would you prefer to give Him when it's your turn?
"Only God can judge me!"
This may work with man, but I don't think I need to explain the flaw in trying to use it against God Himself. If you ask God to judge you, He will. If you ask God not to judge you, tough, He's God. He can judge you, He will judge you.
"Your laws are unfair."
Every child uses this excuse when judged by their parents. Eat your greens before you get your ice cream. "It's not fair!" No, you can't have that expensive toy. "It's not fair!" You have to go to school today. "It's not fair!" The reality is, God absolutely is fair. Man's general objection to God's fairness comes from our own desire to be God. The only way to judge God as being unfair is to come up with your own standard of fairness. But you'll never get that one past Him.
"I'm a good person!"
No you're not. You've broken God's laws, so even though you may have done some good things in your life, God must condemn you for your crimes regardless. No just judge will say "well, you broke the law, but there are several hundred laws you didn't break, so I'll let you go."
"Well this guy sinned too!"
Yup. And God's going to judge that guy too. On Judgement Day, no one's sins are going to matter in your trial except yours. It will be you God is judging. You will never see a lawsuit where someone else's crime in a separate trial excuses the current defendant's.
Face it: On Judgement Day, your goose is cooked. You've got no excuses to make, and there are no excuses God will accept. You are guaranteed to be held accountable for every time you broke His laws. Whining at me won't change that.
But there is one thing that can alter the outcome of your final trial. See, you won't be able to appeal to me, but there is one man who can stop God from condemning you. Jesus Christ, the man without any sin of His own, was condemned by God on your behalf. 2,000 years ago, Jesus came to earth, was born of a virgin, lived a perfect life, and died on the cross. His death purchased the complete and total forgiveness of sins for all who will believe in Him. If, and only if you confess Jesus as Lord and believe in your heart that God raised Him from the dead, you will be saved. Any other plea is guaranteed to fail.