The Corbyn "threat to national security" line is an old cliche. Even the Tories haven't used it since 2015. Please wake up ! You also don't seem to understand the mood of the country is such that were an election be held tomorrow it is highly likely that Jeremy Corbyn would sweep into Downing Street.
This government is paralysed over what sort of Brexit deal it wants and is not fit to govern any longer. You can see Europe's point. How can they negotiate with us when we won't tell them what we want?
I work with blue blooded Tory colleagues, whom I have known all my working life, and they would now openly welcome either a Corbyn government or anti Tory coalition ( I am not kidding), just to get rid of this divided, useless shower.