just simply use as below and it will word wrap any long text within a table . No need to anything else

<td style="word-wrap: break-word;min-width: 160px;max-width: 160px;">long long comments</td>

So you can use the following :

td {
  white-space: normal !important; // To consider whitespace.
}

If this doesn't work:

td {
  white-space: normal !important; 
  word-wrap: break-word;  
}
table {
  table-layout: fixed;
}