There are two sentences:
1) The workers, who went on strike, were dismissed.
2) The workers who went on strike were dismissed.
For me the 2nd sentence is more logical, that is: only those who went on strike were dismissed, as for the 1st sentence: all workers were dismissed and 'who went on strike' is just additional information, am I right?
It would be easier with such an example:
1) The workers, who wear pink socks, were dismissed.
it means that all workers wear such socks, it doesn't have anything to do with their being dismissed, yes?
2) The workers who wear pink socks were dismissed.
Due to these pink socks they were dismissed, am I right?
And something else: how many children could be in the family?
1)They have two children who are still at school.
2)They have two children, who are still at school.