Do you think it's okay for me to threaten having my neighbors dog put down
Is there a reason you want the dog to be put down?
Yes, it barks a lot in the night and in my opinion that dog doesn't bark in a good way
You shouldn't threatened these things unless there is a good reason like an animal being violent. Not having a good cause will make your neighbors resent you and ignore your pleas.
You're just not getting what I want. I'm going to find an animal control officer and bring up these issues.
Have you tried talking to them about it? They may not even be aware that there's an issue. A friendly conversation might solve the issue a lot better than a call to animal control.