Not so.....operative word being "returned" love. If you are a venomous person, can you love someone and have that love returned by a good person? Maybe...but comparing true love of a person to a dog's love for it's master is kind of silly.
You're quite right - I should have said plenty of venomous folk had nice or normal people who loved them. One would hope that their professional face is different to their private manner!
On another note, I won't be drawn into debating the distinction between unconditional love from one human to another and unconditional love from a hound to its master! Too many pet-owning and pet-loathing freepers to reward that type of argument!
Especially since that is an interesting argument but one which has no provable resolution.