I'm not sure which treaties you are referring to but certainly all trade agreements have always been negotiated in secret. And people who were against them have always complained.[1] Are you against climate agreements because they was mostly negotiated in secret?[2] How about US-USSR nuclear disarmament treaties (SALT I, SALT II, ABM)? The Iran nuclear talks?[3]

Do you not understand why they need to be negotiated in public? I guess you don't because you didn't even know they were always negotiated in secret.

[1] https://blog.nader.org/1994/12/26/naftagatt-deals-shrouded-i...

[2] http://www.theguardian.com/environment/2014/nov/12/how-us-ch...

[3] http://www.reuters.com/article/2014/01/01/us-iran-nuclear-bu...