Please be careful of your statement Bro, as you are a Muslim so you should not doubt the real sharia law, rather you can say that you find it strange of some people or countries implementing the sharia law wrongly, BUT that requires you to have full authentic knowledge of the actual law information from Quran and sunnah of the prophet (p&buh).
No offense, but just trying to remind you on the possible sins of the tongue and thought,
Bro, the other comments which you mentioned about the 2nd marriage etc are not at all common and least happening in this part of the world where it has been considered common to have more than one wife… I might agree with you for some insane and crocked mindset who wants to get a second wife and his culture and country does not allow one and he comes up with this kind of the filth.
Just to remind further, the bigger sin is to accuse the chaste women without evidence and that have the greatest punishment starting with 80lashes in this world + no more testimony to be accepted from this person and he offers a sincere remorse and if his apology of this great sin is not accepted by Allah subhan wo tala, he will be punished much severely in the hell.
Peace