They're in the swamp so they believe Trump is the enemy of the state. No one tells them that maybe this is a bad idea. Like you said, they do not see it that way.
When I was younger I did not grasp this idea of a "bubble" of thought that surrounds a group of people.
Now I have seen so many examples of it that it makes me wonder if the majority of the people can ever be made to see things clearly and objectively.
Yes, Washington DC exists in a thought bubble of like minded people reinforcing each others thinking.
No one tells them that maybe this is a bad idea. Like you said, they do not see it that way.
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The Groupthink in liberal circles is very powerful. No one dare to bring up the possibility of adverse outcomes, lest they be accused of not being a team player — or worse, being for the other side. So you may be onto something.