Answer:
it has an irritated tone because the cat is disruptive
The people appear to be dressed formally.
They also appear to be smiling.
<span>My suggestions are in bold.
"Even since the beginning of it all, America has never truly been one."
</span><span>Change even to ever.
</span><span>"While slavery does not any longer pertains to today’s society, the obstacle of ostracism is still prominent. All the time stories of racial police shootings are in the news. Ostracism, or exclusion, is another concerning problem facing the country."
<span>You introduced us to ostracism more than once. An introduction of an key point should not be repeated.</span><span>
"</span></span>All the time stories of racial police shootings are in the news."
It sounds awkward and seems grammatically incorrect. Revise this sentence.
"<span>The purpose many have in mind when they come to the country, freedom of religion results in thousands of different practices of religion with many different views and beliefs."
</span><span>Add a comma after "freedom of religion."
</span><span>"The people of America also have many different beliefs because of their plentiful diversity and backgrounds."
Plentiful is describing diversity. I'm not sure if this is correct or not, but, just to be safe, consider changing "plentiful diversity and backgrounds" to "variety of backgrounds."</span>
So I don't believe that it is common, though I do believe that many can be commonly misinformed. It's not the event that is to be mistaken, instead it is more common to find a misdated event. Does that make sense? So the title or name of the event is not mistaken for another, but instead I believe the date or the event itself can be misinterpreted. Since, in order to know exactly what happened, you need to be there, and at the same time, there are many different perspectives. If you need further explanation, just let me know.
It would be the exact same except without the "I think" at the beginning.