I'm sure the Trump supporters would give the same amount of faith and belief in Hillary if she had won under similar circumstances to these facts about Trump:
1) foreign state helped her campaign by hacking/stealing Trump's emails and outing the bad stuff;
2) several members of her campaign staff, including her relative and top manager, meet on several occasions, with spies from a foreign country who offer to spill dirt on Trump;
3) foreign govt. runs an anonymous social media blitz during campaign, saturating citizens, without their approval, on Facebook and other social media accounts with negative/false stories about Trump;
4) During the campaign, Hillary repeatedly encourages the foreign government to keep up the good work in exposing bad news about Trump
5) FBI investigates possible ties between Hillary's campaign and foreign govt, and director refuses to stop investigating one of her top campaign officials, who she just appointed to be NSD...so Hillary fires him...
6) Hillary runs a constant media blitz, bad-mouthing the FBI and US DOJ special prosecutor appointed after she fired FBI director, looking into connections between her campaign and the foreign government...
7) Hillary continues to play nice with the head of the foreign govt while she is President, and refuses to enforce sanctions on them for meddling in the election..
yeah...all the Trump supporters would let all that slide and not insist on starting, let alone finish, an investigation...