The apologists always try to take each statement in isolation and invent alternative meanings for it that might not be racist. But that is equal to isolating each piece of evidence that smoking causes cancer and finding the particular flaw with the methods for that study to discount it as evidence. There is no smoking gun proving smoking causes cancer, and yet not a rational person in the world doubts it. A different flaw/excuse needs to be given for each piece/type of evidence, while smoking causes cancer is the far simpler account that can explain every result.
Likewise, a different non-racist interpretation is required for each seemingly racist comment, and yet Trump being racist is the extremely simple and perfectly parsimonious account that explains all such statements. Plus, this same mechanism of him being racist also explains the words and actions of others connected to Trump. This includes people that know him privately who say he is extremely racist and worse human being than anyone imagines, despite those people (such as Penn Jillette) being strongly anti-Hillary, aligned with Trump economically, and generally very conservative in most areas other than the racism that has come to define the GOP.
The same parsimonious explanation also accounts fo why so many of his strongest supporters also show clear evidence of racism, and why THE most openly racist people in US support him.
And no, that is not "guilt by association". It is guilt by a overwhelming preponderance of the evidence, of which particular types of associations are merely part of it. And all associations are not equal. Some are completely incidental, such as two completely unconnected people getting on the same bus. But some are meaningful, such as when a people who have proven that they really only care about a single political issue (white power) endorse and strongly back a political candidate. It means that those people who have the most vested interest in figuring out who is on the side of their racist agenda have examined that candidates words and deeds and decided that is their man. When combined with the fact that racism is the only parsimonious explanation for that persons words and deeds, it creates an extremely strong body of converging evidence, despite any one isolated piece on its own being hand-waved with excuses.
In sum, the question is not whether any specific statment is clearly racist, but whether it is plausible the totality of all the statements, endorsements, and things true about Trump would all be true of a person who was not either racist or (arguably worse) deliberately trying to promote racism in order get the backing from racist he needs for his personal gain.
Note the harmful consequences of the latter the same as actually being racist, so it would actually be even more immoral and downright evil if Trump were dishonestly promoting racism for political ends.