Hawking (one could say scientists, but lets not) reveals some thinking on aliens much like that for which theists are mocked. Theists are mocked for making a human-like being they call God. Yet, he imagines (yes, that's the right word) human-like aliens and attributes to them the more violent and aggressive human-like qualities. How is this speculation in keeping with the ever higher ever-improving intelligence model of evolution? This is Hawking, an atheist, projecting on aliens the human behavior of aggression supposedly the by-product of religion and theists. Hawking sees alien life forms as the embodiment of not all that is human, just the negative, evil or worse, _ whatever bring harm for humans. Lets consider this possibility: The idea does not set well with Hawking to be upstaged by an alien life form which suddenly reveals the pitiful level of his intelligence. His daughter Lucy shows a more reasonable view.
Secondly, Hawking is familiar with the ridicule cast on theists as refusing to face the facts of reality. It does not sound true to form to hear Hawking advise man ought not be looking to make contact with alien life. An intelligent life form (humans) avoiding contact with intelligent alien life forms? How is that any different were a northernmost people on earth to avoid looking to contact any probable peoples in the southernmost part of the earth?
Hawking is undeniably quite knowledgeable in his field. Yes, science does work. However, he reveals a science which imagines freely and qualifies those imaginations as reasonable or logical. Furthermore, Hawking would just as soon science work at not working to search for or contact alien life forms. He reveals his lack of unbelief and faith, words shunned by scientists, so lets say he trifles the work of man (to say nothing of God) such that he has given up the fight before the battle even begins.
According to evolution an alien visit to earth would be like Columbus' visit to the Americas a catastrophe where the weak perish and the strong survive. Science, says Hawking, will win.
It is therefore no wonder that in the Hawking mindset an alien life not of this world which visited earth in human-form with human-like qualities should be rejected as was Jesus. He looked human. He acted human. He did not fulfill the human expectation of alien life forms of aggression and conquest. Jesus is the embodiment of the love God. Hawking advises his children: if you are lucky enough to find love, remember it is there and don't throw it away. He may not have been lucky enough to find it yet, but it's there to accept or to throw away.
For God so loved the world,
that he gave his one and only Son,
that whoever believes in him should not perish, but have eternal life.
Love triumphs not in those who remember to reason and observe it at a distance, but in those who embrace it.