It might be questionable to have relations with 16-year olds by modern standards, but it is not an act of pedophilia. Pedophiles prey on sexually immature children.
In Roy Moore's time, while seeking relationships with 16-year olds may or may not have been the norm, we did not yet possess the sort of knowledge that we now do about the possible negative impact on emotional and cognitive growth, caused by relationships at an immature (mental) age. The common understanding appears to be that a person ought to be emotionally mature once they are 17 years old. Sexual maturity is no longer the determining factor, as it once was.
The reality is that most 20 to 30 year old males sought after younger company, and may have even been socially pressured to do so, especially in Christian circles. It's hard to determine whether Moore was truly predator-like, or whether he was simply acting as was expected of a Christian man at the time. Grooming a young wife, in order to have as many healthy children as possible, is a fundamentally Christian practise.
Hell, we are bringing in men from foreign countries who have married their wives a lot younger than 16. It's going to be a real shit-show once we start sorting that out.