He's actually correct.
And this is why I discuss the Lily White Republican movement which started shortly after the end of Reconstruction, and is exactly what you think it is, feel free to Google it.
I'll note that quite a few prominent republicans, including Ronald Reagan, Richard Nixon, and GHWB (
Read this) were at some point strongly against integration of any sort, and campaigned in favor of what was effectively white supremacism. GHWB, for what it's worth, softened somewhat when he was president. Nixon and Reagan, not so much.
The GOP's affinity with racism did not start when Johnson decided to get on board with basic civil rights - it was long before then.
But we're in 2018 now. The last democratic president was Barack Obama, their last nominee was Hillary Clinton. In this time, the GOP slid from the iffy but ultimately responsible McCain, to the snake Mitt Romney who simply decided to cater to such impulses, to the obvious white supremacist Agolf Twitler*. Their party is openly attempting to suppress black and Latinx voters, to the point of using bizarre reasoning to gut the Voting Rights Act. They are now moving away from any form of pursuing any sort of discrimination against minorities up to and including state violence and home, lending, and hiring discrimination.
This party has fully embraced white supremacism - using black and brown people as away to drive wealth to a certain group of whit people, while also convincing the white "have nots" that their problems are caused by Muslims, "Illegals", black people, and so forth.
(I'd discuss LGBT and womens' rights as well, but that's probably best left to others, and in another thread)
In short, Obama was absolutely correct in his assessment of the current GOP in his recent speech.
So yeah, it's not just one point 50 years ago. this is the end point of over a century of hard work. A round of applause for the group that managed to take the mantle from the violently pro-slavery, Native slaughtering folks. They really put a lot of work, and now it's paid off, in the form of young angry white guys marching around and screaming "Jews will not replace us!"
And an actual sincere round of applause for the democratic party, who are...well, still flawed, but who mostly shed that skin that the GOP is now wearing.