Si + Imperfect subjunctive for "if only/I wish"

In Spanish, if we want to express a strong wish we Sometimes use:

This structure is similar to using "ojalá". The equivalent in English would be "if only.../I wish...". 

Let's see some examples:

Also, this could express what someone "wonders" about something or a specific situation. For example:

Rather than a wish, here the speaker expresses that s/he wonders what people's reaction would be towards what is happening. 

See also Using the Spanish imperfect subjunctive in hypothetical clauses introduced by si followed by the Spanish conditional simple