In my opinion opportunities were missed by movement leaders on both sides to help bridge the divide in cultures and eliminated some of this if leadership on either or both sided had had the foresight to pitch in and get behind publicly each others causes and demonstrations.

Just think of the strong solidarity engendering symbolism of AA leaders and organizations taking part in undocumented and DACA demonstrations or Latinx leadership and organizations getting involved in Black Lives Matter demonstrations.

animosity?

Think about it. Some are susceptible to the overwhelming and constant re-enforcement of anti-black messages coming from mainstream culture towards African Americans.

In other words, to cozy up to the larger culture by aping the racism towards African Americans seems advantageous to some. And that happens in other minority groups as well.

Some African Americans feel resentment from being displaced not just by the steering of of Latinx into dominating formerly AA neighborhoods, but by the actual displacement by Latinx as the largest minority group in the country. And that resentment has some irony to it as the larger society allowed undocumented people in to do off-the-books work in construction, lawn maintenance, household domestic work etc., but then turned against them when racist and scheming repug pols like trump saw a wedge issue to use to get elected. It's a been-there-done-that resentment by some AAs who've always been targeted and now see the targeting going towards those who were almost invited in until it became convenient to turn against them.

From either perspective, opportunities were missed by movement leaders of bothe groups to build solidarity among two ethnic groups who would have been stronger in solidarity towards each other than resentment.