I've already circled the smoking gun evidence. If you've combed through the House report, really thought about its contents, read the House Republicans' joke of a "rebuttal" report, and still don't see it that way: then, well, okay.
That's the thing about "high crimes and misdemeanors." It's a loose political definition, open to interpretation by Congress. Beliefs are not irrelevant.
We're in uncharted waters now: this is only the 3rd time impeachment has happened in our country's history (Johnson, Clinton, and now Trump: Nixon resigned before impeachment was formally opened). Because it's so unprecedented, and the issues are necessarily new and complex each time, people are going to see things differently. And to your credit: you are offering some of the more reasoned arguments in defense of Trump that I've seen here, and you seem open-minded and intelligent.
But I promise you, the vast majority of Trump's defenders here haven't really engaged with the evidence and the testimony, and they don't intend to. They dismiss it out of hand as a product of Democratic "bias."