'There's nothing wrong with taking information from Russians'
No, but taking Intelligence from Putin over our own Intelligence when he says that there's totally no interference from his end smacks of a Conflict of Interest. Even if you're deluded enough to take Trump's word for Putin's word for Russian Intelligence, you have to think that Our agencies are more invested in Our security than Oligarchs in bed with Russian mobsters, and hackers.
Consider the source. Consider sources overseas like that with Our sources, but where they conflict, I'm going to stick with the side with a vested interest in Our security, over a president that continues to side with our Enemy's.