My own thinking is that when you exempt yourself from constitutional constraints, as Trump did in lying about the election and inciting a riot, it's game on. I'd be curious to hear a counter-rationale other than the obvious (and equally true) "B...b...but FISA is just as unconstitutional" or the equally-true "But Trump hadn't yet done that at the time the FBI investigated his campaign." His relationship with Paul Manafort alone was arguably sufficient to set an aggressive counterintelligence investigation into motion. If Trump didn't wish to be treated like a captive Russian asset, he might have tried not acting exactly like one.