Are you concerned with Congress opinion not to impeach?
Yes. I'm on the fence as to whether Congress should impeach also but I think he's most likely guilty and in a perfect world he should be impeached. However we have an upcoming election and we saw what the impeachment of Clinton did to Republicans.
Then again Clinton was more popular than Trump is now (or at least not as unpopular) and I'm not so sure impeachment would hurt the Democrats here. Especially when you consider there are other on going investigations in other jurisdictions, Trumps taxes may come out shortly, Trump who can't keep his hand from the fire and won't for whatever reason stop talking about the Mueller report.
There is a lot up in the air and in the end I think the Democrats (or their leadership anyway) are playing it too safe, understandably so but they should probably just pull the trigger. So, I don't fault the Dems who are for or against impeachment, I just happen to marginally disagree with one side.