The problem isn't that anyone met with foreign officials. The problem comes in meeting with foreign officials and doing so for the express purpose of receiving opposition-impairing political resources and information. Doing that is tantamount to giving one's benediction to the foreign actor's inserting themselves into what is not their nation's political process.
One should not be surprised that foreign powers and agents attempt to exert whatever influence they can in another nation's political process, but one must not endorse their doing so by, as a candidate for office, by both accepting and/or allowing to be deployed direct political aid (physical resources or information) they may offer to advance one's campaign goal(s) and diminish those of one's opponents.
After all, in what country's interest is a foreign national going to make "dirt" available? Unless the individual is a defector or traitor, it's certainly not their own country.
Now tell us how the DNC were heavily involved with funding the fake 'dossier' against Trump.
If the shoe had been on the other foot do you seriously believe Hillary and the DNC wouldn't have happily attended ANY meeting if there was any chance to dig up dirt on Trump?
Ya ******* right!
When that little *** BONOBO looked into the camera and claimed he was the President and Trump would never be and then he dropped his cellphone ALL bets were off as far as having any respect for him.
The DNC got what they richly deserved.
Now they are nothing more than crybabies.