sure, they are simply the ones studying it and analyzing the data using decades of education and experience. what the fuck do they know, let's just let any random asshole take a stab at it.
also, the issue isn't the fact the climate has changed before. we know it has, and acting like scientists have no clue on that is fuckin retarded. the entire point of all this is we have a nice climate now, and with all the people we have on earth, we'd like to keep it that way or we will face some serious problems. also, we don't know exactly what happens during an accelerated climate change, and things are happening far more rapidly than they even anticipated.
so we are taking a gamble on modern society because arrogant non science fucks are taking a political stance on this for the sake of ego or just outright evil motives. sounds fuckin awesome to me, lets go.