King spoke out against anti-Semitism

"Peace for Israel means security, and we must stand with all our might to protect its right to exist, its territorial integrity. I see Israel as one of the great outposts of democracy in the world, and a marvelous example of what can be done, how desert land can be transformed into an oasis of brotherhood and democracy. Peace for Israel means security and that security must be a reality."  

https://m.youtube.com/watch?v=kvr2Cxuh2Wk

He also questioned Israel’s action against Palestinians 

[Update: King canceled a planned trip to Israel in September 1967 in part because of political misgivings over the annexation of Jerusalem. He reportedly told his aides in a conference call:

[“I’d run into the situation where I’m damned if I say this and I’m damned if I say that no matter what I’d say, and I’ve already faced enough criticism including pro-Arab.  I just think that if I go, the Arab world, and of course Africa and Asia for that matter, would interpret this as endorsing everything that Israel has done, and I do have questions of doubt…  Most of it [the pilgrimage] would be Jerusalem and they [the Israelis] have annexed Jerusalem, and any way you say it they don’t plan to give it up…  I frankly have to admit that my instincts – and when I follow my instincts so to speak I’m usually right – I just think that this would be a great mistake. I don’t think I could come out unscathed”

https://mondoweiss.net/2015/01/folks-talking-palestine/