(1) I don't know how old you are, but back in that day (cold war era) and earlier, communist sympathizers were investigated, as our nation rightfully feared an internal communist takeover.
(2) Runaway government is covered in probably half of the other threads here at FR. This is a thread about MLK, and unfortunately there are Freepers here who have naively bought into the myth.
(3) All President Heston did was agree with the original merits of marching for equality. I don't think anyone will argue against that, but I doubt Heston truly approved of the messanger in his later years.
And I don’t know how old you are either. But the best friend communists in America ever had were racists. Especially those in states that had segregation.
Show me a serious communist plot take seize power in America in the 50s or 60s, and ill show you the bomber gap and the missile gap. Both were figments of the imagination. So no, we did not rightfully fear a communist takeover back then, we idiotically did.
But the communists were very eager to find a chink in Americas moral armor. Like water, they find the slightest crack. They were able to damage us a lot with institutionalized racism by pointing out how it was the exact opposite of our lofty stated ideals.
A racist is a communist’s greatest friend.