You just put the problem into focus. Trump pushing the lab leak hypothesis and using the term "China virus" is indisputably a xenophobic dog whistle to a racist subset of his base. But that doesn't mean the lab leak hypothesis and any discussion of it is racist, and based on what's been uncovered since, it's certainly not a baseless accusation.
Trump has used this tactic effectively many times in the past: he says something that makes sense ("we need border security") in such a racist and distasteful way that causes the opposition to kneejerk react against whatever policy he's proposing, forcing them to take a position that's at odds with common sense ("border walls are racist!"). It's possible he may have had some classified information about the lab leak being a feasible story, but I also wouldn't be surprised if it was just one of the thousands of things he blabbers uncontrollably about and this particular one luckily happened to have some truth to it.
Trump has used this tactic effectively many times in the past: he says something that makes sense ("we need border security") in such a racist and distasteful way that causes the opposition to kneejerk react against whatever policy he's proposing, forcing them to take a position that's at odds with common sense ("border walls are racist!"). It's possible he may have had some classified information about the lab leak being a feasible story, but I also wouldn't be surprised if it was just one of the thousands of things he blabbers uncontrollably about and this particular one luckily happened to have some truth to it.