Out of curiosity, what is your assessment of the veracity of the intelligence community's assessment that Russia interfered in the US elections. This is a general question and is independent of the specific question of if there was collusion with the Trump campaign.
I'm fairly certain that Trump himself doesn't distinguish between these two things.
He's a simple man with simple instincts, and he has taught his followers to see thing through his own lens, in which all negative press coverage is basically identical "fake news". Russians subverting democracy casts a pall over his electoral college win, so he hates it and says it didn't happen. Stormy Daniels and Hillary Clinton are both crooked. He can't be guilty of collusion because his hands are so big. He's not a racist because of Benghazi. See how easy this is?
Anything that isn't flattering to Trump must be fake, and he lumps it all together and denies everything. There is no nuance, no recognition of valid criticisms, no distinguishing between scandals. As a result, Russian election interference and colluding with the Russians are basically identical in his mind, and therefore the assessment of every US intelligence agency is identical to the Mueller investigation (witch hunt!). His supporters seem to have totally bought this effort at obfuscation.
The hilarious part, to me, is that there's a very nonzero chance that on this particular example of conflating topics, they really ARE the same thing. If the Trump campaign did conspire with the Russians to sway the election, as suggested by his RNC speech, then in this case the collusion and the interference really might be one and the same story.