If he's telling the truth about Trump, then does that truth also include the lack of collusion with Russia?
Seems to be quite a stretch from "This one individual didn't see evidence of collusion" to "collusion did not occur".
Or do people think they should be able to pick and chose what things are true and which are lies?
He may have said some true things and some false things. That's why there is an "investigation" - to see what corroborating evidence there is, to determine the true from the false.
it's the same as claiming that because you were caught speeding you must also be guilty of murder.
Don't quite follow this - Cohen is alleging a ton of illegal activity besides the Russia / election issue. If you are arrested for bank robbery, and the police find you have a kilo of cocaine in your pocket, they can't charge you with drug possession also?
He's "cooperating" to get himself the best deal he can because he's a sleazebag.
He cooperated in the past, and got a reduced sentence as a result. That part is closed, over and done with. This is a different hearing. He has struck his deal, he got his reduced sentence. Nothing he says here reduces his time any further. On the other hand, if he is caught perjuring anew, he will certainly get more time. Seems he has little incentive to lie.
Agree with you on the "sleaze" part though. Ten years of association with Trump will do that to a person.