Salam Alqali
Are you asking about killing in self defence? Self defence is allowed in Islam but try to avoid "killing" in self defence

.[/QOUTE]
So killing is generally bad in Islam?
In Islam, murder is a really big crime so the answer is ofcourse, no.
005.032 مِنْ أَجْلِ ذَلِكَ كَتَبْنَا عَلَى بَنِي إِسْرَائِيلَ أَنَّهُ مَنْ قَتَلَ نَفْسًا بِغَيْرِ نَفْسٍ أَوْ فَسَادٍ فِي الأرْضِ فَكَأَنَّمَا قَتَلَ النَّاسَ جَمِيعًا وَمَنْ أَحْيَاهَا فَكَأَنَّمَا أَحْيَا النَّاسَ جَمِيعًا وَلَقَدْ جَاءَتْهُمْ رُسُلُنَا بِالْبَيِّنَاتِ ثُمَّ إِنَّ كَثِيرًا مِنْهُمْ بَعْدَ ذَلِكَ فِي الأرْضِ لَمُسْرِفُونَ
005.032 On that account: We ordained for the Children of Israel that if any one slew a person - unless it be for murder or for spreading mischief in the land - it would be as if he slew the whole people: and if any one saved a life, it would be as if he saved the life of the whole people. Then although there came to them Our messengers with clear signs, yet, even after that, many of them continued to commit excesses in the land.
Al-Qur'an, 005.032 (Al-Maeda [The Table, The Table Spread])
Text Copied from DivineIslam's Qur'an Viewer software v2.910
Why don't you save both your afterlife and your children's afterlife? You should be a good Muslim yourself and urge you children to be good muslims. What do you think?
Killing them seems to be the sure-way of making them get to where I hope them to be.
Your quote really made me feel good somehow, how can I obtain such a software?