ASSALAMUALYKUM,
Brother, I think I got the answer. Brother, you need to understand one thing, we don't know, HOW MANY YEARS AGO LUT(AS) LIVED? Do we? NO. If the claimant who claims that Quran is false, and knows how many years ago LUT(AS) lived, then I think he should have become the world's number one historian. Not even the Historians could tell how many years ago he lived. If you want ,you can search it on Google also. You won't find any article which suggest, how many years ago he lived. So, how Wiki Islam came to know Prophet Lut's living period, which the historians couldn't even tell?
But it's sure he lived before ISA(AS). Brother beaware of the sites like Wiki Islam, Answering Islam, Islam Watch, Understanding Islam, Jihad Watch etc. They will mislead you anyway.They are very smart. Yes visit but after having sufficient knowledge in QURAN,HADITH,ARABIC LANGUAGE,HISTORY,SCIENCE AND MATHEMATICS. Then you will be able to understand their trick. As Islam is the true religion it has the highest number of enemies. Listen we are alone only ALLAH is with us. Have you ever seen the other countries coming for help when Muslim countries fall in trouble?
? No. Yes they might come only to recover their own interest. Just look at Palestine,Iraq,Afghanistan,Yemen etc. They are alone fighting their enemies.No one is helping them. This is because they are Muslims. It seems everyone is after Islam.Brother still if you have confusion you can again raise it. I don't if I could clear your confusion or not.
TAKE CARE