You cannot excuse the one and not the other, unless you intend to be hypocritical about it.
I was explaining why many Conservatives think that what we know about Putin is encouraging us to hope that he is moving in the right direction--even as we know that America is moving in the wrong direction.
This is relevant as to why Trump & Putin exchange compliments. It is relevant as to why we should encourage, not discourage, Putin from dealing with Isis. It is relevant to all sorts of other considerations.